Name
Purdue University Globle
NU566 NP I – Introduction to Primary Care for the Nurse Practitioner
Prof. Name
Date
Recognizing the characteristic signs and symptoms of neurological, pulmonary, cardiovascular, and endocrine disorders is essential for safe clinical practice and effective nursing care. Conditions such as stroke, delirium, dementia, seizures, asthma, COPD, heart failure, hypertension, diabetes, and thyroid disease can share overlapping symptoms, making focused assessment and clinical reasoning especially important. This review highlights high-yield findings, diagnostic considerations, treatment principles, and patient-teaching points that nursing students and healthcare professionals can use for exam preparation and clinical practice.
Neurological disorders can affect cognition, movement, sensation, coordination, speech, and consciousness. Early recognition of neurological changes can help clinicians identify emergencies such as stroke, intracranial hemorrhage, meningitis, encephalitis, and Guillain-Barré syndrome before permanent complications occur.
Cognitive changes in older adults should not automatically be attributed to normal aging. A careful assessment should distinguish normal age-related changes from dementia, delirium, medication effects, depression, metabolic abnormalities, infection, and other reversible conditions.
Polypharmacy, commonly referring to the use of multiple medications, increases the risk of adverse drug reactions, drug interactions, falls, and cognitive impairment in older adults. Age-related changes in renal and hepatic function can also alter medication metabolism and clearance.
When an older adult develops new confusion, healthcare providers should review prescription medications, over-the-counter products, supplements, recent medication changes, and adherence before assuming that dementia is responsible.
Dementia is an umbrella term describing acquired cognitive decline that interferes with independent daily functioning. Depending on the cause, patients may develop progressive problems with memory, language, executive functioning, reasoning, visuospatial skills, or behavior.
Anomia, or difficulty finding the appropriate word, can occur in several neurocognitive disorders.
Common findings may include:
Progressive cognitive decline
Difficulty learning or remembering new information
Word-finding problems
Impaired judgment
Difficulty managing familiar activities
Changes in personality or behavior
Unlike delirium, dementia generally develops gradually rather than over a period of hours.
Alzheimer’s disease is the most common cause of dementia. Early disease frequently affects the ability to learn and retain new information because brain regions involved in memory, including the hippocampal formation, are affected.
Patients may develop progressive:
Short-term memory impairment
Difficulty learning new information
Word-finding difficulties
Disorientation
Changes in behavior or personality
Difficulty completing activities of daily living
Cholinesterase inhibitors such as donepezil, rivastigmine, and galantamine may be used to manage symptoms in appropriate patients. Memantine may also be used in moderate to severe disease.
People with Down syndrome have an increased risk of Alzheimer’s disease because chromosome 21 contains the gene that encodes amyloid precursor protein.
The Mini-Mental State Examination (MMSE) is a 30-point cognitive screening instrument that assesses several domains of cognition.
Areas commonly evaluated include:
Orientation
Registration
Attention and calculation
Recall
Language
Visuospatial skills
The MMSE can help identify cognitive impairment and monitor changes over time, but it should not be used by itself to establish a diagnosis of dementia.
Delirium is an acute disturbance in attention and awareness that usually develops over hours to days. Mental status can fluctuate substantially throughout the day, and the underlying cause should be identified and treated promptly.
Common characteristics include:
Sudden onset
Inattention
Fluctuating level of awareness
Disorganized thinking
Altered sleep-wake patterns
Perceptual disturbances in some patients
Common precipitating factors include infection, dehydration, metabolic disturbances, medication effects, withdrawal, pain, hypoxia, urinary retention, constipation, and hospitalization.
Because delirium may indicate an underlying medical emergency, new acute confusion requires prompt assessment rather than simply labeling the patient as having dementia.
Stroke is a medical emergency caused by interruption of blood flow to the brain or bleeding within the brain. Rapid recognition and treatment can reduce neurological disability and improve outcomes.
Sudden facial drooping, arm or leg weakness, speech difficulty, vision changes, severe imbalance, or other sudden neurological deficits should be treated as possible stroke symptoms.
Patients and bystanders should activate emergency medical services immediately rather than waiting for symptoms to resolve.
The BE FAST approach can help with recognition:
B — Balance: sudden loss of balance or coordination
E — Eyes: sudden vision changes
F — Face: facial drooping
A — Arms: sudden weakness or numbness
S — Speech: difficulty speaking or understanding
T — Time: call emergency services immediately
A rapid brain imaging study, commonly a non-contrast CT scan, is used to determine whether intracranial hemorrhage is present before intravenous thrombolytic therapy is administered for an eligible patient with suspected acute ischemic stroke.
Thrombolytic therapy is contraindicated when intracranial bleeding is present.
Intravenous thrombolytic therapy is most effective when given as soon as possible to eligible patients. Traditional treatment windows have emphasized treatment within 4.5 hours for selected patients, while advanced imaging can allow certain patients to receive treatment outside conventional windows.
Mechanical thrombectomy can also provide substantial benefit for selected patients with large-vessel occlusion, including some patients presenting later after symptom onset.
The principle remains simple: time-sensitive stroke treatment requires rapid assessment and intervention.
A carotid bruit may suggest turbulent blood flow associated with carotid artery narrowing, although a bruit alone does not establish clinically significant stenosis.
Patients with symptomatic carotid stenosis may be evaluated for carotid endarterectomy or other vascular interventions depending on the degree of stenosis, anatomy, surgical risk, and timing of symptoms.
Traumatic brain injuries can produce several types of intracranial bleeding. Recognizing their characteristic patterns can help clinicians identify patients who require urgent imaging and neurosurgical evaluation.
A subdural hematoma usually develops when bridging veins are torn after head trauma.
Older adults are particularly vulnerable because age-related brain atrophy increases tension on bridging veins. Symptoms can develop gradually and may include headache, confusion, weakness, altered consciousness, or progressive neurological deterioration.
An epidural hematoma is commonly associated with temporal bone trauma and injury to the middle meningeal artery.
A classic presentation may include:
Initial loss of consciousness
A lucid interval
Rapid neurological deterioration
Increasing intracranial pressure
Not every patient develops the classic lucid interval, so any deterioration after head trauma requires urgent evaluation.
Headaches are common neurological complaints, but sudden or unusually severe headaches may indicate a serious underlying condition. Clinical assessment should consider onset, location, severity, associated symptoms, triggers, neurological findings, and previous headache history.
Migraine commonly causes moderate to severe headache and may be associated with:
Unilateral or bilateral throbbing pain
Nausea or vomiting
Photophobia
Phonophobia
Activity-related worsening
Common triggers include stress, sleep disruption, hormonal changes, certain foods, and alcohol.
Photophobia is a particularly common migraine-associated symptom.
Cluster headaches cause severe, strictly unilateral pain, typically around the eye or temple. Attacks often occur in clusters over weeks or months.
Associated autonomic symptoms may include:
Tearing
Nasal congestion or rhinorrhea
Eyelid swelling
Ptosis or miosis
Restlessness
High-flow oxygen and specific medications such as subcutaneous sumatriptan are established acute treatments for cluster headache.
Correct seizure classification helps guide treatment, safety counseling, and further neurological evaluation.
Absence seizures are brief episodes of impaired awareness characterized by staring and sudden interruption of activity. Episodes commonly last only seconds and usually do not produce prolonged postictal confusion.
They occur most frequently in children and may happen many times per day.
Patients who experience seizures should be counseled about driving restrictions. Requirements vary by jurisdiction, so patients should follow applicable state or local regulations and recommendations from their healthcare provider.
Multiple sclerosis (MS) is an immune-mediated disease of the central nervous system involving demyelination and neurodegeneration. It can affect the brain, spinal cord, and optic nerves.
MS commonly begins in young adulthood and is more frequent in women than men.
Clinical manifestations vary according to the location of central nervous system lesions.
Possible symptoms include:
Visual disturbances
Muscle weakness
Numbness or tingling
Fatigue
Balance and coordination problems
Spasticity
Bladder dysfunction
Cognitive changes
There is no single test that independently confirms MS. Diagnosis is based on clinical findings and evidence of lesions disseminated in time and space.
Diagnostic evaluation may include:
MRI of the brain and spinal cord
Cerebrospinal fluid analysis
Neurological examination
Evoked potential testing in selected patients
Relapsing-remitting MS is characterized by episodes of neurological dysfunction followed by periods of partial or complete recovery.
High-dose corticosteroids, such as intravenous methylprednisolone, are commonly used for significant acute relapses. Disease-modifying therapies are used to reduce disease activity and future relapses in appropriate patients.
Parkinson disease is a progressive neurodegenerative disorder associated with dysfunction and loss of dopaminergic neurons, particularly within the substantia nigra.
The major motor features include:
Bradykinesia
Resting tremor
Rigidity
Postural instability
Patients may also develop:
Shuffling gait
Freezing episodes
Reduced arm swing
Stooped posture
Difficulty initiating movement
Postural instability tends to become more prominent as disease progresses and may be particularly pronounced in atypical parkinsonian disorders.
Huntington disease is an inherited neurodegenerative disorder caused by a pathogenic expansion in the HTT gene.
It can produce:
Choreiform involuntary movements
Progressive cognitive impairment
Personality changes
Psychiatric symptoms
Functional decline
The disease progresses over time and ultimately affects the patient’s ability to perform daily activities independently.
Myasthenia gravis is an autoimmune disorder affecting neuromuscular transmission. The defining feature is fluctuating, fatigable skeletal muscle weakness.
Common manifestations include:
Ptosis
Diplopia
Difficulty swallowing
Dysarthria
Facial weakness
Limb weakness
Symptoms typically worsen with activity and improve with rest.
Respiratory muscle weakness can cause a myasthenic crisis, which requires emergency treatment and respiratory monitoring.
Neurological infections can progress rapidly and require timely recognition.
Aseptic meningitis refers to meningitis without typical bacterial growth on routine culture and is often caused by viruses.
Common symptoms include:
Headache
Fever
Neck stiffness
Photophobia
Nausea or vomiting
Treatment depends on the underlying cause. Supportive care is appropriate for many viral cases, while specific antiviral or other therapy may be required for certain infections.
Bacterial meningitis is a medical emergency. Streptococcus pneumoniae is an important cause of bacterial meningitis in adults.
Empiric treatment depends on age, risk factors, local resistance patterns, and suspected organisms and may include a third-generation cephalosporin combined with other agents when indicated.
Herpes simplex virus is a major cause of sporadic viral encephalitis.
Because early treatment can significantly improve outcomes, intravenous acyclovir should be started promptly when HSV encephalitis is suspected, while diagnostic testing continues.
Bell’s palsy is an acute peripheral facial nerve (cranial nerve VII) palsy that causes unilateral facial weakness.
Patients may have difficulty:
Closing the affected eye
Smiling
Raising the eyebrow
Tasting food normally
Early corticosteroid treatment is commonly recommended for appropriate adults and improves the likelihood of complete recovery.
Guillain-Barré syndrome (GBS) is an acute immune-mediated peripheral neuropathy that commonly causes progressive, symmetrical weakness.
Typical findings include:
Ascending weakness
Reduced or absent deep tendon reflexes
Tingling or sensory symptoms
Difficulty walking
Autonomic dysfunction
Respiratory function must be monitored closely because weakness can progress rapidly to respiratory failure.
The trigeminal nerve provides facial sensation and motor function for mastication. It also contributes the sensory limb of the corneal reflex.
Assessment may include:
Facial sensation
Jaw strength
Muscle function during chewing
Corneal reflex when clinically indicated
Neurological assessment should extend beyond isolated physical findings. Functional questions about recent events, current affairs, medication management, personal safety, and activities of daily living can provide useful information about memory, judgment, orientation, and executive functioning.
Respiratory disorders are major contributors to illness and hospitalization worldwide. Accurate assessment of cough, dyspnea, wheezing, chest pain, oxygenation, respiratory rate, and functional limitations helps clinicians distinguish between common respiratory disorders and potentially life-threatening conditions.
Important conditions include asthma, COPD, pneumonia, tuberculosis, obstructive sleep apnea, influenza, and lung cancer.
Respiratory symptoms can have pulmonary, cardiac, gastrointestinal, medication-related, or psychological causes. A detailed history is therefore essential.
In adults, chronic cough is generally defined as a cough lasting more than eight weeks.
Common causes include:
Upper airway cough syndrome
Asthma
Gastroesophageal reflux disease
Nonasthmatic eosinophilic bronchitis
ACE inhibitor use
Chronic respiratory disease
Smoking history, medication use, environmental exposures, associated symptoms, and duration should be assessed.
ACE inhibitors can cause a persistent, usually dry cough because inhibition of ACE reduces the breakdown of bradykinin and related mediators.
If an ACE inhibitor is responsible, the cough usually improves after discontinuation, although resolution may take several weeks.
An ARB may be considered as an alternative when clinically appropriate.
Anxiety and panic attacks can produce shortness of breath, chest tightness, rapid breathing, and a sensation of air hunger. However, anxiety should not be diagnosed before serious cardiopulmonary causes have been appropriately considered.
Gastroesophageal reflux can contribute to chronic cough, including cough without typical heartburn symptoms. Evaluation should consider reflux symptoms, medication use, diet, body weight, and other common causes of chronic cough.
Allergic rhinitis occurs when the immune system responds to environmental allergens such as pollen, dust mites, mold, or animal dander.
Common symptoms include:
Sneezing
Nasal congestion
Clear rhinorrhea
Nasal itching
Itchy or watery eyes
Postnasal drainage
Intranasal corticosteroids are generally among the most effective treatments for persistent allergic rhinitis. Antihistamines may also reduce symptoms.
Viral respiratory infections can cause overlapping symptoms, including cough, fever, congestion, fatigue, and sore throat.
Molecular testing, including PCR-based methods, is commonly preferred for identifying respiratory viruses when laboratory confirmation is needed. Direct fluorescent antibody testing can detect viral antigens but is used less frequently than molecular methods in many contemporary clinical settings.
Antiviral therapy can reduce the duration and severity of influenza, particularly when started early and in patients at increased risk of complications.
Oseltamivir is approved for treatment of influenza in infants 2 weeks of age and older, according to U.S. prescribing information.
Pneumonia can range from mild illness to life-threatening respiratory failure.
Community-acquired pneumonia (CAP) develops outside the hospital or shortly after admission.
Streptococcus pneumoniae remains an important bacterial cause of CAP.
Common clinical findings include:
Fever
Cough
Sputum production
Dyspnea
Pleuritic chest pain
Crackles on auscultation
Treatment depends on disease severity, comorbidities, recent antibiotic exposure, and local resistance patterns.
Hospital-acquired pneumonia develops 48 hours or more after hospital admission and was not present at the time of admission.
Potential pathogens include gram-negative organisms and methicillin-resistant Staphylococcus aureus (MRSA).
Antibiotic selection should account for local resistance patterns and individual risk factors.
CURB-65 is a clinical prediction tool used to help assess the severity of community-acquired pneumonia.
The five components are:
C — Confusion
U — Urea/BUN elevation
R — Respiratory rate ≥30/min
B — Blood pressure reduction
65 — Age 65 years or older
A higher score indicates greater risk and can support decisions regarding treatment location, although clinical judgment remains essential.
Tuberculosis (TB) is an infectious disease caused primarily by Mycobacterium tuberculosis. It most commonly affects the lungs but can involve other organs.
The tuberculin skin test is interpreted by measuring induration, not erythema.
A reaction of 5 mm or more is considered positive in certain highest-risk groups, including people with HIV, recent contacts of infectious TB cases, and individuals with significant immunosuppression.
Other risk groups use higher induration thresholds.
False-negative results can occur when immune responses are impaired.
Possible contributing factors include:
Advanced HIV infection
Immunosuppressive medications
Severe illness
Recent TB infection
Very young or advanced age
TB treatment requires a multidrug regimen tailored to the type of TB and susceptibility results.
Patients receiving isoniazid should be taught to:
Take medication exactly as prescribed.
Complete the prescribed treatment course.
Report symptoms of liver injury.
Avoid excessive alcohol use.
Report numbness or tingling in the hands and feet.
Isoniazid can cause peripheral neuropathy by interfering with vitamin B6 metabolism. Pyridoxine supplementation is recommended for patients with risk factors for neuropathy and in other situations specified by treatment guidelines.
Asthma is a chronic inflammatory airway disorder characterized by variable respiratory symptoms and variable expiratory airflow limitation.
Patients may experience:
Wheezing
Cough
Chest tightness
Shortness of breath
Symptoms that vary over time
Asthma symptoms can worsen after exposure to allergens, exercise, respiratory infections, smoke, or other triggers.
Asthma severity and treatment should be assessed using current guideline criteria rather than relying solely on older classification systems. Patients with persistent symptoms generally require an inhaled corticosteroid-containing treatment strategy.
LABAs should not be used as monotherapy in asthma. They should be used with inhaled corticosteroid therapy or as part of an appropriate combination inhaler regimen.
Albuterol provides rapid bronchodilation and may be used for quick relief when prescribed.
Potential adverse effects include:
Tremor
Tachycardia
Palpitations
Nervousness
Frequent reliance on a rescue inhaler can indicate inadequate asthma control and should prompt reassessment.
Theophylline has a narrow therapeutic index and is used much less frequently in modern asthma management.
Traditional therapeutic serum concentrations are often cited as approximately 5–15 mcg/mL, although target concentrations depend on the clinical situation and laboratory reference range.
Toxicity can cause nausea, vomiting, tremor, tachyarrhythmias, seizures, and other serious complications.
COPD is a chronic respiratory disease characterized by persistent airflow obstruction and respiratory symptoms associated with airway and/or alveolar abnormalities.
Chronic bronchitis is clinically characterized by chronic productive cough. Patients may develop mucus hypersecretion, airway inflammation, impaired gas exchange, and progressive airflow limitation.
Emphysema involves destruction of alveolar walls and loss of elastic recoil, contributing to air trapping and hyperinflation.
Possible findings include:
Dyspnea
Decreased breath sounds
Hyperinflation
Reduced exercise tolerance
Weight loss in advanced disease
Historically, GOLD spirometric stages have classified airflow limitation according to post-bronchodilator FEV₁. GOLD 1 corresponds to FEV₁ ≥80% predicted in patients with confirmed persistent airflow obstruction.
Current COPD assessment also incorporates symptoms and exacerbation history rather than spirometry alone.
Alpha-1 antitrypsin deficiency is an inherited condition that can cause emphysema, particularly in younger adults or people who develop COPD with little or no smoking exposure.
Testing should be considered in appropriate patients with COPD or unexplained emphysema.
Long-term oxygen therapy improves survival in selected patients with severe chronic resting hypoxemia. It is generally prescribed for substantial periods each day, often at least 15 hours daily, when guideline criteria are met.
Lung cancer is a major cause of cancer-related mortality worldwide.
Cigarette smoking is the leading risk factor.
Additional risks include:
Secondhand smoke
Radon exposure
Asbestos
Occupational carcinogens
Certain environmental exposures
Family history
Smoking cessation remains one of the most effective ways to reduce lung cancer risk.
Non-small cell lung cancer includes adenocarcinoma, squamous cell carcinoma, and large cell carcinoma.
Adenocarcinoma is currently the most common histologic type of lung cancer and occurs in smokers and nonsmokers.
Squamous cell carcinoma has a strong association with tobacco exposure.
The TNM system describes cancer extent:
T: primary tumor characteristics
N: regional lymph node involvement
M: distant metastasis
For example, T1N0M0 describes a small primary tumor without regional lymph node involvement or distant metastasis.
A tumor at the lung apex can affect the sympathetic nerve pathway and produce Horner syndrome.
The classic triad includes:
Ptosis
Miosis
Anhidrosis
New-onset Horner syndrome requires evaluation for an underlying lesion, including an apical lung tumor when clinically appropriate.
Smoking cessation lowers the risk of cardiovascular disease, COPD progression, stroke, lung cancer, and other tobacco-related conditions.
Healthcare professionals should routinely assess tobacco use and offer evidence-based cessation support.
Patients in the preparation stage of behavior change have typically decided to quit and may have established a quit date or begun preparing for cessation.
Varenicline is a prescription medication that reduces nicotine-related cravings and withdrawal symptoms. A common regimen begins approximately one week before the planned quit date, although alternative approaches may be used.
Nicotine gum is used with the chew-and-park technique. The patient chews the gum until a tingling sensation occurs and then parks it between the cheek and gum to allow nicotine absorption.
Stopping smoking can lead to:
Better circulation
Improved respiratory function
Reduced cardiovascular risk
Lower cancer risk
Improved taste and smell
Reduced risk of premature death
Obstructive sleep apnea (OSA) occurs when the upper airway repeatedly collapses or becomes obstructed during sleep.
Important risk factors include:
Obesity
Increased neck circumference
Older age
Male sex
Craniofacial abnormalities
Family history
Certain anatomical airway characteristics
A neck circumference greater than approximately 17 inches in men has traditionally been associated with increased OSA risk, although risk should be evaluated as part of the overall clinical picture.
Continuous positive airway pressure (CPAP) is a highly effective treatment for moderate to severe OSA and works by maintaining upper-airway patency during sleep.
Treatment pressure is individualized rather than fixed for every patient.
Patients who cannot tolerate CPAP or have specific anatomical abnormalities may be referred for evaluation of alternative therapies, including surgery or other upper-airway interventions.
Cardiovascular disorders are among the most important causes of morbidity and mortality worldwide. Nurses and other healthcare professionals must recognize early manifestations of hypertension, coronary artery disease, heart failure, arrhythmias, vascular disease, and acute coronary syndromes.
Hypertension often produces no obvious symptoms, which is why it is frequently described as a “silent” condition. Persistent uncontrolled blood pressure can damage the heart, brain, kidneys, eyes, and blood vessels.
Hypertension becomes more common with age, but elevated blood pressure should not be considered an unavoidable or normal part of aging.
Risk factors include:
Excess body weight
High dietary sodium intake
Physical inactivity
Tobacco use
Excessive alcohol consumption
Family history
Diabetes
Kidney disease
Accurate measurement is essential before diagnosing or adjusting treatment for hypertension.
Patients should:
Rest quietly for approximately 5 minutes.
Sit with the back supported.
Keep both feet flat on the floor.
Avoid talking during the measurement.
Keep the arm supported at heart level.
Use an appropriately sized cuff.
An incorrectly sized cuff can produce inaccurate readings.
Lifestyle modification is an important component of hypertension management.
Recommended strategies include:
Weight management
Regular physical activity
Sodium reduction
A heart-healthy dietary pattern such as DASH
Tobacco cessation
Limiting alcohol intake
Common first-line medication classes include:
Thiazide-type diuretics
ACE inhibitors
Angiotensin receptor blockers
Calcium channel blockers
Medication selection should be individualized according to age, comorbidities, kidney function, pregnancy status, race and ethnicity where relevant to guideline recommendations, and other clinical factors.
Patients starting or changing antihypertensive therapy generally require follow-up within several weeks, with timing determined by blood pressure severity and treatment plan.
Elevated LDL cholesterol contributes to atherosclerotic cardiovascular disease.
LDL cholesterol contributes to atherosclerotic plaque formation, while HDL participates in reverse cholesterol transport.
An HDL level of 60 mg/dL or higher has traditionally been considered favorable, but cardiovascular risk assessment should not rely on HDL alone.
Lowering LDL cholesterol is a central component of reducing cardiovascular risk in appropriate patients.
High-intensity statins such as atorvastatin 40–80 mg or rosuvastatin 20–40 mg can generally reduce LDL cholesterol by approximately 50% or more.
Patients with established atherosclerotic cardiovascular disease are commonly candidates for high-intensity statin therapy unless contraindications or treatment limitations exist.
Coronary artery disease develops when atherosclerotic plaque narrows or obstructs the coronary arteries.
Stable angina commonly causes pressure, tightness, heaviness, or discomfort that occurs with exertion or emotional stress and improves with rest or prescribed antianginal medication.
Pain may radiate to the:
Arm
Shoulder
Neck
Jaw
Back
Prinzmetal, or vasospastic, angina occurs because of transient coronary artery vasospasm.
Episodes often occur at rest and may occur at night or in the early morning. Calcium channel blockers and nitrates are commonly used for prevention and treatment.
Nitroglycerin is used to relieve or prevent angina by producing vasodilation and reducing cardiac workload.
Patients with suspected acute coronary syndrome should seek emergency medical care immediately. They should not delay emergency evaluation by repeatedly taking nitroglycerin at home.
If chest discomfort persists despite prescribed nitroglycerin, emergency services should be activated according to the patient’s emergency action plan.
Sublingual nitroglycerin tablets should be kept in their original tightly closed container and protected from heat, light, and moisture. Medication should be replaced according to the manufacturer’s expiration and storage instructions.
Acute myocardial infarction requires rapid restoration of coronary blood flow and evidence-based medical treatment.
For eligible patients with ST-elevation myocardial infarction, primary percutaneous coronary intervention is generally preferred when it can be performed within recommended time targets.
When timely PCI is unavailable, fibrinolytic therapy may be considered for appropriate patients without contraindications.
The goal is rapid reperfusion because prolonged coronary ischemia increases myocardial damage.
Heart failure occurs when the heart cannot adequately meet the body’s circulatory demands or can do so only with elevated filling pressures.
Common manifestations include:
Dyspnea
Fatigue
Exercise intolerance
Peripheral edema
Orthopnea
Paroxysmal nocturnal dyspnea
Rapid weight gain from fluid retention
Bilateral leg edema can occur with heart failure but may also result from venous disease, kidney disease, liver disease, medications, and other conditions.
When edema occurs with dyspnea, orthopnea, elevated jugular venous pressure, or rapid weight gain, heart failure should be considered.
B-type natriuretic peptide (BNP) and N-terminal pro-BNP can support the evaluation of suspected heart failure.
An elevated level indicates cardiac stress but does not independently establish the diagnosis. Results must be interpreted alongside symptoms, examination findings, imaging, and other diagnostic information.
Patients with advanced or stage D heart failure may require specialized management.
Depending on individual circumstances, treatment may involve:
Advanced heart failure consultation
Device therapy
Mechanical circulatory support
Heart transplantation evaluation
Palliative care
Peripheral arterial disease occurs when atherosclerosis or other vascular disease reduces blood flow to the extremities.
Possible findings include:
Intermittent claudication
Cool extremities
Diminished pulses
Shiny or pale skin
Hair loss on the legs
Thickened nails
Delayed wound healing
The ankle-brachial index compares systolic blood pressure at the ankle with systolic blood pressure in the arm.
An ABI of 0.90 or lower supports a diagnosis of peripheral arterial disease.
Major surgery, immobility, cancer, previous VTE, and certain medical conditions increase the risk of deep vein thrombosis.
Prevention may include:
Early ambulation
Intermittent pneumatic compression
Graduated compression when appropriate
Pharmacologic thromboprophylaxis when indicated
Pulmonary embolism should be considered when a patient develops sudden or unexplained:
Dyspnea
Pleuritic chest pain
Tachycardia
Hypoxemia
Syncope
CT pulmonary angiography is commonly used for diagnosis when appropriate. A V/Q scan may be preferred when CT contrast is contraindicated or another clinical indication exists.
Recognizing ECG patterns and correlating them with symptoms and hemodynamic status is essential for managing arrhythmias.
Atrial fibrillation is the most common sustained cardiac arrhythmia.
It is associated with conditions such as:
Hypertension
Heart failure
Coronary artery disease
Valvular disease
Increasing age
The most important complication is thromboembolic stroke.
CHA₂DS₂-VASc is used to estimate thromboembolic risk in many patients with atrial fibrillation.
The components include:
C: congestive heart failure
H: hypertension
A₂: age 75 or older
D: diabetes
S₂: prior stroke, TIA, or systemic embolism
V: vascular disease
A: age 65–74
Sc: sex category
Stroke-prevention decisions should be individualized according to current guidelines and patient characteristics.
Wolff-Parkinson-White syndrome results from an accessory conduction pathway.
ECG findings classically include:
Short PR interval
Delta wave
Widened QRS complex
Patients may experience episodes of tachyarrhythmia.
PSVT causes sudden episodes of rapid heart rate originating above the ventricles.
Assessment should include:
Heart rate
Blood pressure
Symptoms
ECG rhythm
Hemodynamic stability
Treatment depends on the patient’s condition and rhythm.
PVCs are common and may occur in healthy individuals. Treatment depends on symptoms, frequency, ventricular function, and the presence of structural heart disease.
Frequent PVCs can occasionally contribute to cardiomyopathy and therefore warrant further evaluation when the burden is high.
Second-degree AV block includes:
Mobitz type I (Wenckebach)
Mobitz type II
Mobitz type II is more concerning because it can progress to complete heart block and often requires pacing evaluation.
An S4 occurs when blood enters a stiff or noncompliant ventricle during atrial contraction. It can be associated with conditions such as left ventricular hypertrophy and hypertension.
Jugular venous distention suggests elevated right-sided filling pressure or central venous pressure.
Potential causes include:
Right-sided heart failure
Fluid overload
Pulmonary hypertension
Severe tricuspid valve disease
Mitral stenosis obstructs blood flow from the left atrium to the left ventricle.
Rheumatic heart disease remains an important cause worldwide.
Patients may develop:
Dyspnea
Fatigue
Palpitations
Atrial fibrillation
Aortic sclerosis involves thickening and calcification of the aortic valve without significant obstruction.
It can progress to aortic stenosis, so patients may require periodic clinical monitoring.
Antibiotic prophylaxis for infective endocarditis is recommended only for specific high-risk patients undergoing certain dental procedures. Patients with prosthetic cardiac valves are among those who may qualify.
Routine prophylaxis is not recommended for everyone with cardiovascular disease.
Dabigatran is a direct thrombin inhibitor used for indications such as stroke prevention in appropriate patients with nonvalvular atrial fibrillation and treatment or prevention of venous thromboembolism.
Idarucizumab is a specific reversal agent for dabigatran in emergency situations.
Direct oral anticoagulants include medications such as:
Apixaban
Rivaroxaban
Edoxaban
Dabigatran
Unlike warfarin, DOACs generally do not require routine INR monitoring. However, renal function, medication interactions, adherence, and bleeding risk still require monitoring.
Lifestyle modification complements medication and procedural treatment.
Important interventions include:
Maintaining a healthy body weight
Regular physical activity
Following a heart-healthy dietary pattern
Controlling diabetes and blood pressure
Avoiding tobacco
Limiting excessive alcohol intake
Managing stress
Maintaining appropriate lipid levels
Endocrine disorders affect hormone production, metabolism, growth, energy balance, and homeostasis. Diabetes, thyroid disease, adrenal disorders, obesity, metabolic syndrome, and gout are common conditions that require accurate assessment and long-term management.
Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia resulting from impaired insulin secretion, insulin action, or both.
Long-term glucose management reduces the risk of microvascular complications and contributes to lower cardiovascular risk.
Hemoglobin A1C provides an estimate of average glycemia over approximately the previous two to three months.
For many nonpregnant adults with diabetes, an A1C goal of less than 7% is appropriate, although individualized targets may be higher or lower depending on age, comorbidities, hypoglycemia risk, life expectancy, and patient preferences.
The oral glucose tolerance test remains an important diagnostic test in specific clinical circumstances.
Patients with markedly elevated blood glucose should assess for ketones and symptoms of metabolic decompensation before exercising.
Patients with significant hyperglycemia and ketones should avoid strenuous exercise because activity may worsen metabolic instability.
Hypoglycemia is generally defined as a blood glucose level below 70 mg/dL.
For a conscious patient who can safely swallow, the standard initial treatment is approximately 15 grams of fast-acting carbohydrate, followed by reassessment after about 15 minutes.
Appropriate options include:
Glucose tablets
Glucose gel
Regular fruit juice
Regular soda
If glucose remains low, the treatment should be repeated.
Severe hypoglycemia with altered consciousness requires emergency treatment, such as glucagon when available and appropriate.
Good glycemic control can reduce the risk of diabetic complications involving the:
Eyes
Kidneys
Peripheral nerves
Cardiovascular system
Feet
Blood pressure and lipid management are also important components of comprehensive diabetes care.
Foot assessment should be incorporated into diabetes care.
Healthcare professionals should evaluate:
Skin integrity
Sensation
Peripheral pulses
Ulcers
Infection
Deformities
Calluses
Charcot neuroarthropathy can cause progressive destruction and deformity of the foot in patients with peripheral neuropathy.
A warm, swollen, red foot in a person with diabetes and neuropathy requires prompt evaluation because Charcot neuroarthropathy can be mistaken for infection.
People with diabetes require regular comprehensive eye examinations according to diabetes type, age, duration of disease, pregnancy status, and previous retinal findings.
Screening intervals may be extended in selected patients with consistently normal examinations and stable glycemic control, but follow-up should follow current ophthalmologic and diabetes guidelines.
Recurrent vulvovaginal candidiasis can occur with hyperglycemia and may be a reason to evaluate for diabetes when other risk factors or symptoms are present.
Diabetic ketoacidosis is a potentially life-threatening metabolic emergency characterized by hyperglycemia or, in some cases, euglycemia, ketosis, and metabolic acidosis.
Common findings include:
Kussmaul respirations
Dehydration
Nausea and vomiting
Abdominal pain
Ketosis
Altered mental status in severe cases
Common triggers include infection, missed insulin, new-onset diabetes, and other physiological stressors.
Treatment includes fluid replacement, electrolyte management, and insulin therapy, with close monitoring of potassium and other laboratory values.
HHS typically occurs in people with type 2 diabetes and is characterized by severe hyperglycemia, profound dehydration, increased serum osmolality, and variable neurological impairment.
Compared with DKA, significant ketosis and acidosis are usually absent or less pronounced.
Metformin remains an important medication for type 2 diabetes and improves insulin sensitivity while generally having a low risk of hypoglycemia when used alone.
Renal function should be assessed because metformin is contraindicated or restricted at certain levels of kidney impairment.
Sulfonylureas such as glipizide can cause hypoglycemia.
Pregnancy requires special consideration, and insulin is commonly preferred when pharmacologic treatment is necessary.
Prednisone and other glucocorticoids can increase blood glucose by increasing hepatic glucose production and insulin resistance.
Patients receiving systemic corticosteroids may require more frequent glucose monitoring and medication adjustment.
Medications used for painful diabetic neuropathy may include certain antidepressants, anticonvulsants, and other neuropathic pain agents depending on patient-specific factors.
The thyroid gland produces hormones that influence metabolism, energy use, cardiovascular function, growth, and development.
Hypothyroidism occurs when thyroid hormone production is insufficient.
Common manifestations include:
Fatigue
Cold intolerance
Constipation
Weight gain
Dry skin
Bradycardia
Depression or slowed thinking
TSH is generally the primary initial laboratory test for suspected primary hypothyroidism.
Levothyroxine is the standard thyroid hormone replacement medication for primary hypothyroidism.
It is generally taken on an empty stomach, commonly 30–60 minutes before breakfast, or consistently at another appropriate time according to prescribing instructions.
TSH is commonly used to monitor treatment in primary hypothyroidism.
Hyperthyroidism occurs when the body is exposed to excessive thyroid hormone activity.
Symptoms may include:
Weight loss
Heat intolerance
Tremor
Palpitations
Anxiety
Increased sweating
Tachycardia
Frequent bowel movements
Evaluation commonly includes TSH and free T4, with additional testing based on the suspected cause.
Graves disease is an autoimmune disorder in which thyroid-stimulating antibodies activate the thyroid gland.
It is a common cause of hyperthyroidism and may produce characteristic eye findings such as thyroid eye disease.
Thyrotoxicosis refers to the clinical state resulting from excessive circulating thyroid hormone effects. Hyperthyroidism is one cause of thyrotoxicosis, but the terms are not synonymous.
Radioactive iodine can be used to treat hyperthyroidism in appropriately selected patients. It destroys thyroid tissue and frequently results in eventual hypothyroidism requiring thyroid hormone replacement.
Most thyroid nodules are benign, but suspicious nodules require further evaluation.
Concerning findings may include:
Rapid growth
Hoarseness
Cervical lymphadenopathy
Difficulty swallowing
Firm or fixed mass
Thyroid ultrasound is an important initial imaging test for evaluating thyroid nodules.
Fine-needle aspiration may be recommended for nodules with suspicious ultrasound characteristics and sufficient size according to established risk-stratification criteria.
The adrenal glands produce hormones involved in blood pressure regulation, metabolism, stress responses, and electrolyte balance.
Cushing syndrome develops from prolonged exposure to excessive cortisol.
Common findings include:
Central obesity
Rounded or “moon” face
Dorsocervical fat accumulation
Purple striae
Hypertension
Hyperglycemia
Muscle weakness
Easy bruising
Screening tests may include the 1-mg overnight dexamethasone suppression test, late-night salivary cortisol, or urinary free cortisol depending on the clinical situation.
Addison disease is a form of primary adrenal insufficiency.
Common manifestations include:
Fatigue
Weight loss
Hypotension
Hyperpigmentation
Salt craving
Abdominal symptoms
Hyponatremia
Hyperkalemia
Glucocorticoid replacement with hydrocortisone or an equivalent medication is a cornerstone of treatment. Mineralocorticoid replacement may also be necessary in primary adrenal insufficiency.
Obesity is associated with increased risk for diabetes, cardiovascular disease, hypertension, sleep apnea, osteoarthritis, and several cancers.
A BMI of 30.0–34.9 kg/m² is classified as Class I obesity.
For example, a BMI of 32 kg/m² falls within Class I obesity.
BMI is a screening measure and should be interpreted alongside other clinical factors.
Metabolic syndrome describes a cluster of cardiovascular and metabolic risk factors, including central obesity, elevated blood pressure, abnormal glucose regulation, elevated triglycerides, and low HDL cholesterol.
For women, a waist circumference of 35 inches or greater is commonly used as one criterion in U.S. definitions, although thresholds can vary by guideline and population.
Gout is an inflammatory arthritis caused by deposition of monosodium urate crystals in joints and tissues.
Important risk factors include:
Hyperuricemia
Chronic kidney disease
Obesity
Alcohol consumption
High-purine dietary patterns
Certain medications
Metabolic syndrome
Patients may benefit from:
Maintaining adequate hydration
Achieving a healthy body weight
Limiting excessive alcohol intake
Reducing intake of purine-rich meats and seafood
Avoiding sugar-sweetened beverages high in fructose
Some evidence suggests that cherries may be associated with a lower risk of recurrent gout attacks, although they should not replace urate-lowering therapy when such treatment is indicated.
Colchicine is commonly used to treat acute gout flares.
Thiazide and loop diuretics can increase serum uric acid and may contribute to gout in susceptible patients. Medication decisions should be individualized rather than based solely on the presence of gout.
Gynecomastia is benign enlargement of male breast glandular tissue. Potential causes include hormonal changes, medications, liver disease, kidney disease, obesity, and endocrine disorders.
Persistent, painful, asymmetric, or unexplained breast enlargement should be evaluated clinically.
Pheochromocytoma is a catecholamine-producing tumor that can cause episodic or sustained hypertension.
Classic symptoms include:
Headache
Sweating
Palpitations
Hypertension
Other symptoms may include tremor, anxiety, and pallor.
Chvostek sign occurs when tapping over the facial nerve produces facial muscle contraction.
It may be associated with hypocalcemia, although it is not sufficiently specific to diagnose hypocalcemia by itself.
Lifestyle interventions support the prevention and management of many endocrine and metabolic disorders.
Patients should be encouraged to:
Maintain a healthy body weight.
Engage in regular physical activity.
Follow a balanced, nutrient-dense diet.
Monitor blood glucose when indicated.
Take prescribed medications consistently.
Attend recommended preventive screenings.
Avoid tobacco and excessive alcohol.
Follow individualized nutrition recommendations.
Dementia generally involves a gradual decline in cognitive function that interferes with daily activities, whereas delirium is an acute disturbance in attention and awareness that develops over hours to days and commonly fluctuates. Delirium is often caused by an underlying medical problem and should be treated as a potentially urgent condition.
Brain imaging is performed to determine whether intracranial hemorrhage is present and to evaluate the brain before reperfusion treatment. Thrombolytic therapy is intended for eligible patients with acute ischemic stroke and can be dangerous when intracranial bleeding is present.
Metformin remains an important first-line medication for many adults with type 2 diabetes, but current treatment is increasingly individualized. GLP-1 receptor agonists and SGLT2 inhibitors may be prioritized for patients with cardiovascular disease, heart failure, chronic kidney disease, obesity, or other specific indications.
Pyridoxine, or vitamin B6, helps prevent isoniazid-associated peripheral neuropathy in patients who have risk factors for this complication.
A commonly cited therapeutic serum concentration is approximately 5–15 mcg/mL. Because theophylline has a narrow therapeutic index, concentrations above the therapeutic range can cause serious toxicity, including arrhythmias and seizures.
The cardinal motor features are bradykinesia, resting tremor, and rigidity. Postural instability can develop as the disease progresses. Shuffling gait, freezing, and reduced arm swing are also common clinical findings.
Long-term oxygen therapy benefits selected patients with severe chronic resting hypoxemia who meet established clinical criteria. It should not be prescribed solely because a patient has COPD or experiences occasional shortness of breath.
Rapid growth, hoarseness, cervical lymphadenopathy, fixation, and suspicious ultrasound characteristics can indicate a higher risk of malignancy and warrant further evaluation.
DKA is characterized by ketosis and metabolic acidosis and commonly occurs in people with type 1 diabetes, although it can occur in type 2 diabetes as well. HHS usually occurs in type 2 diabetes and is characterized by severe hyperglycemia, profound dehydration, increased serum osmolality, and little or no significant ketosis.
Stopping tobacco use reduces the risk of cardiovascular disease, stroke, COPD progression, lung cancer, and other tobacco-related diseases. Smoking cessation also improves long-term health and reduces premature mortality.
For nursing students and healthcare professionals, the most important concepts are not simply memorizing isolated facts but recognizing patterns and connecting symptoms with appropriate clinical actions.
High-yield priorities include:
Treat sudden neurological deficits as possible stroke.
Distinguish acute, fluctuating delirium from gradual cognitive decline.
Monitor patients with Guillain-Barré syndrome for respiratory compromise.
Recognize the fatigable weakness associated with myasthenia gravis.
Identify meningitis and encephalitis as potentially life-threatening infections.
Understand that asthma requires an inhaled corticosteroid-containing treatment strategy when controller therapy is indicated.
Recognize severe hypoxemia as the primary indication for long-term oxygen therapy in COPD.
Treat persistent or unexplained chest pain as a potential acute coronary syndrome.
Recognize atrial fibrillation as an important risk factor for thromboembolic stroke.
Monitor patients with diabetes for hypoglycemia, DKA, HHS, neuropathy, kidney disease, and eye complications.
Use TSH appropriately when evaluating suspected primary hypothyroidism.
Recognize the characteristic manifestations of adrenal insufficiency and cortisol excess.
Combine lifestyle modification with evidence-based pharmacologic therapy for chronic disease management.
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