2026 Cardiovascular Pathophysiology
Nursing Study Guide Practice Questions
Answer Rationales Heart Failure
Hypertension Coronary Disease Shock
Clinical Findings
SECTION 1: HEART FAILURE PATHOPHYSIOLOGY (Questions 1–30)
Question 1. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is the primary compensatory response to decreased cardiac output in
heart failure?
A. Decreased sympathetic nervous system activity
B. Activation of the renin-angiotensin-aldosterone system (RAAS)
C. Increased parasympathetic nervous system activity
D. Decreased antidiuretic hormone (ADH) release
Rationale: When cardiac output decreases, the renin-angiotensin-aldosterone
system (RAAS) is activated as a compensatory mechanism. This leads to sodium
and water retention, vasoconstriction, and increased blood volume, which initially
maintains blood pressure and perfusion but eventually worsens heart failure by
increasing preload and afterload.
Question 2. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by impaired ventricular filling due to decreased
ventricular compliance?
A. Systolic heart failure
B. Diastolic heart failure
C. Right-sided heart failure
D. High-output heart failure
Rationale: Diastolic heart failure (HFpEF - heart failure with preserved ejection
fraction) is characterized by impaired ventricular filling due to decreased
,ventricular compliance. The ventricle becomes stiff and cannot relax properly
during diastole, leading to increased filling pressures and pulmonary congestion
despite a normal ejection fraction.
Question 3. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by impaired ventricular contraction and reduced
ejection fraction?
A. Systolic heart failure
B. Diastolic heart failure
C. Right-sided heart failure
D. High-output heart failure
Rationale: Systolic heart failure (HFrEF - heart failure with reduced ejection
fraction) is characterized by impaired ventricular contraction, leading to a reduced
ejection fraction (less than 40%). The ventricle cannot pump blood effectively,
resulting in decreased cardiac output and increased preload.
Question 4. A nurse is reviewing the pathophysiology of left-sided heart failure.
Which clinical manifestation is most characteristic?
A. Peripheral edema
B. Pulmonary congestion and dyspnea
C. Jugular venous distention
D. Hepatomegaly
Rationale: Left-sided heart failure is characterized by pulmonary congestion and
dyspnea because the left ventricle cannot effectively pump blood forward, causing
blood to back up into the pulmonary circulation. This leads to pulmonary edema,
crackles, orthopnea, and paroxysmal nocturnal dyspnea.
Question 5. A nurse is reviewing the pathophysiology of right-sided heart failure.
Which clinical manifestation is most characteristic?
A. Pulmonary crackles
B. Orthopnea
C. Peripheral edema and jugular venous distention
D. Paroxysmal nocturnal dyspnea
Rationale: Right-sided heart failure is characterized by systemic congestion,
leading to peripheral edema, jugular venous distention (JVD), hepatomegaly, and
,ascites. The right ventricle cannot effectively pump blood forward, causing blood
to back up into the systemic circulation.
Question 6. A nurse is reviewing the pathophysiology of heart failure. Which
compensatory mechanism initially helps maintain cardiac output but eventually
worsens heart failure?
A. Decreased heart rate
B. Ventricular hypertrophy
C. Decreased contractility
D. Vasodilation
Rationale: Ventricular hypertrophy is a compensatory mechanism that initially
helps maintain cardiac output by increasing the muscle mass and contractile force
of the heart. However, over time, hypertrophy leads to increased myocardial
oxygen demand, decreased ventricular compliance, and eventually worsening heart
failure.
Question 7. A nurse is reviewing the pathophysiology of heart failure. Which
laboratory value is most specific for heart failure?
A. Serum sodium
B. B-type natriuretic peptide (BNP)
C. Serum potassium
D. Serum creatinine
Rationale: B-type natriuretic peptide (BNP) is released by the ventricles in
response to increased wall stress and volume overload. An elevated BNP level
(above 100 pg/mL) is highly specific for heart failure and correlates with the
severity of the condition.
Question 8. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is responsible for the increased heart rate seen in heart failure?
A. Decreased sympathetic nervous system activity
B. Increased sympathetic nervous system activity
C. Increased parasympathetic nervous system activity
D. Decreased catecholamine release
Rationale: Increased sympathetic nervous system activity is a compensatory
mechanism in heart failure that increases heart rate and contractility to maintain
, cardiac output. However, chronic sympathetic activation leads to increased
myocardial oxygen demand, arrhythmias, and further cardiac dysfunction.
Question 9. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by increased cardiac output despite normal or
increased ventricular function?
A. Systolic heart failure
B. Diastolic heart failure
C. High-output heart failure
D. Low-output heart failure
Rationale: High-output heart failure is characterized by increased cardiac output
despite normal or increased ventricular function. It occurs when the body's
metabolic demands are abnormally high, such as in severe anemia,
hyperthyroidism, sepsis, or arteriovenous fistulas.
Question 10. A nurse is reviewing the pathophysiology of heart failure. Which
factor can precipitate an acute exacerbation of heart failure?
A. Decreased salt intake
B. Infection
C. Regular exercise
D. Weight loss
Rationale: Infection is a common precipitant of acute heart failure exacerbation.
Infections increase metabolic demands, cause fever and tachycardia, and can lead
to increased fluid retention, all of which worsen cardiac function.
Question 11. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is responsible for the increased preload seen in heart failure?
A. Decreased venous return
B. Sodium and water retention
C. Decreased blood volume
D. Vasodilation
Rationale: Sodium and water retention, mediated by the RAAS and ADH,
increases blood volume and venous return to the heart, leading to increased
preload. This compensatory mechanism initially helps maintain cardiac output but
eventually worsens heart failure by increasing ventricular workload.
Nursing Study Guide Practice Questions
Answer Rationales Heart Failure
Hypertension Coronary Disease Shock
Clinical Findings
SECTION 1: HEART FAILURE PATHOPHYSIOLOGY (Questions 1–30)
Question 1. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is the primary compensatory response to decreased cardiac output in
heart failure?
A. Decreased sympathetic nervous system activity
B. Activation of the renin-angiotensin-aldosterone system (RAAS)
C. Increased parasympathetic nervous system activity
D. Decreased antidiuretic hormone (ADH) release
Rationale: When cardiac output decreases, the renin-angiotensin-aldosterone
system (RAAS) is activated as a compensatory mechanism. This leads to sodium
and water retention, vasoconstriction, and increased blood volume, which initially
maintains blood pressure and perfusion but eventually worsens heart failure by
increasing preload and afterload.
Question 2. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by impaired ventricular filling due to decreased
ventricular compliance?
A. Systolic heart failure
B. Diastolic heart failure
C. Right-sided heart failure
D. High-output heart failure
Rationale: Diastolic heart failure (HFpEF - heart failure with preserved ejection
fraction) is characterized by impaired ventricular filling due to decreased
,ventricular compliance. The ventricle becomes stiff and cannot relax properly
during diastole, leading to increased filling pressures and pulmonary congestion
despite a normal ejection fraction.
Question 3. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by impaired ventricular contraction and reduced
ejection fraction?
A. Systolic heart failure
B. Diastolic heart failure
C. Right-sided heart failure
D. High-output heart failure
Rationale: Systolic heart failure (HFrEF - heart failure with reduced ejection
fraction) is characterized by impaired ventricular contraction, leading to a reduced
ejection fraction (less than 40%). The ventricle cannot pump blood effectively,
resulting in decreased cardiac output and increased preload.
Question 4. A nurse is reviewing the pathophysiology of left-sided heart failure.
Which clinical manifestation is most characteristic?
A. Peripheral edema
B. Pulmonary congestion and dyspnea
C. Jugular venous distention
D. Hepatomegaly
Rationale: Left-sided heart failure is characterized by pulmonary congestion and
dyspnea because the left ventricle cannot effectively pump blood forward, causing
blood to back up into the pulmonary circulation. This leads to pulmonary edema,
crackles, orthopnea, and paroxysmal nocturnal dyspnea.
Question 5. A nurse is reviewing the pathophysiology of right-sided heart failure.
Which clinical manifestation is most characteristic?
A. Pulmonary crackles
B. Orthopnea
C. Peripheral edema and jugular venous distention
D. Paroxysmal nocturnal dyspnea
Rationale: Right-sided heart failure is characterized by systemic congestion,
leading to peripheral edema, jugular venous distention (JVD), hepatomegaly, and
,ascites. The right ventricle cannot effectively pump blood forward, causing blood
to back up into the systemic circulation.
Question 6. A nurse is reviewing the pathophysiology of heart failure. Which
compensatory mechanism initially helps maintain cardiac output but eventually
worsens heart failure?
A. Decreased heart rate
B. Ventricular hypertrophy
C. Decreased contractility
D. Vasodilation
Rationale: Ventricular hypertrophy is a compensatory mechanism that initially
helps maintain cardiac output by increasing the muscle mass and contractile force
of the heart. However, over time, hypertrophy leads to increased myocardial
oxygen demand, decreased ventricular compliance, and eventually worsening heart
failure.
Question 7. A nurse is reviewing the pathophysiology of heart failure. Which
laboratory value is most specific for heart failure?
A. Serum sodium
B. B-type natriuretic peptide (BNP)
C. Serum potassium
D. Serum creatinine
Rationale: B-type natriuretic peptide (BNP) is released by the ventricles in
response to increased wall stress and volume overload. An elevated BNP level
(above 100 pg/mL) is highly specific for heart failure and correlates with the
severity of the condition.
Question 8. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is responsible for the increased heart rate seen in heart failure?
A. Decreased sympathetic nervous system activity
B. Increased sympathetic nervous system activity
C. Increased parasympathetic nervous system activity
D. Decreased catecholamine release
Rationale: Increased sympathetic nervous system activity is a compensatory
mechanism in heart failure that increases heart rate and contractility to maintain
, cardiac output. However, chronic sympathetic activation leads to increased
myocardial oxygen demand, arrhythmias, and further cardiac dysfunction.
Question 9. A nurse is reviewing the pathophysiology of heart failure. Which type
of heart failure is characterized by increased cardiac output despite normal or
increased ventricular function?
A. Systolic heart failure
B. Diastolic heart failure
C. High-output heart failure
D. Low-output heart failure
Rationale: High-output heart failure is characterized by increased cardiac output
despite normal or increased ventricular function. It occurs when the body's
metabolic demands are abnormally high, such as in severe anemia,
hyperthyroidism, sepsis, or arteriovenous fistulas.
Question 10. A nurse is reviewing the pathophysiology of heart failure. Which
factor can precipitate an acute exacerbation of heart failure?
A. Decreased salt intake
B. Infection
C. Regular exercise
D. Weight loss
Rationale: Infection is a common precipitant of acute heart failure exacerbation.
Infections increase metabolic demands, cause fever and tachycardia, and can lead
to increased fluid retention, all of which worsen cardiac function.
Question 11. A nurse is reviewing the pathophysiology of heart failure. Which
mechanism is responsible for the increased preload seen in heart failure?
A. Decreased venous return
B. Sodium and water retention
C. Decreased blood volume
D. Vasodilation
Rationale: Sodium and water retention, mediated by the RAAS and ADH,
increases blood volume and venous return to the heart, leading to increased
preload. This compensatory mechanism initially helps maintain cardiac output but
eventually worsens heart failure by increasing ventricular workload.
