NR 507 Final Exam – Advanced
Pathophysiology – (2026) Chamberlain
University – Actual Questions &Correct
Answers with In-Depth Rationales !
SECTION 1: CARDIOVASCULAR PATHOPHYSIOLOGY (Questions 1-30)
1. A 68-year-old male with a history of hypertension presents with progressive dyspnea
on exertion, orthopnea, and paroxysmal nocturnal dyspnea. Which pathophysiological
mechanism best explains these symptoms?
A) Decreased cardiac output leading to systemic hypoperfusion
B) Increased pulmonary capillary hydrostatic pressure causing interstitial and alveolar
edema
C) Reduced renal perfusion activating the renin-angiotensin-aldosterone system
D) Impaired peripheral vasodilation response to exercise
CORRECT ANSWER: B
Rationale: Left-sided heart failure results in increased left ventricular end-diastolic
pressure, which is transmitted backward to the pulmonary vasculature. This increases
pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial space and
alveoli, causing the classic symptoms of dyspnea, orthopnea, and PND . Option A
describes low-output states but does not explain pulmonary symptoms directly. Option
C describes a compensatory mechanism rather than the primary pathophysiological
cause. Option D is characteristic of other conditions.
2. A patient with chronic heart failure has been prescribed an ACE inhibitor. What is the
primary therapeutic mechanism of this drug class in heart failure management?
A) Blocking beta-1 adrenergic receptors to reduce heart rate and contractility
,B) Preventing the conversion of angiotensin I to angiotensin II, reducing vasoconstriction
and aldosterone release
C) Inhibiting phosphodiesterase to increase intracellular cAMP and cardiac contractility
D) Blocking calcium channels to reduce afterload and myocardial oxygen demand
CORRECT ANSWER: B
Rationale: ACE inhibitors block the conversion of angiotensin I to angiotensin II, a potent
vasoconstrictor that also stimulates aldosterone release. This reduces afterload,
preload, and sodium/water retention, improving cardiac output and reducing
symptoms . Option A describes beta-blockers. Option C describes inotropes like
milrinone. Option D describes calcium channel blockers.
3. A 55-year-old female presents with acute-onset chest pain radiating to her left arm,
accompanied by diaphoresis and nausea. An ECG shows ST-segment elevation in
leads V1-V4. Which of the following is the most appropriate immediate intervention?
A) Administration of sublingual nitroglycerin and observation
B) Immediate percutaneous coronary intervention (PCI)
C) Intravenous thrombolytic therapy with alteplase
D) Administration of oral aspirin and beta-blocker therapy
CORRECT ANSWER: B
Rationale: ST-segment elevation myocardial infarction (STEMI) requires immediate
reperfusion therapy. PCI is the preferred method if available within 90 minutes of first
medical contact. It directly restores coronary blood flow by opening the occluded
vessel. Thrombolytics are an alternative if PCI is not available within the recommended
time frame. Aspirin is an adjunct therapy, not the primary intervention . The ST elevation
in V1-V4 indicates an anterior MI, which carries high mortality risk and requires urgent
intervention.
,4. A patient with right-sided heart failure exhibits jugular venous distension,
hepatomegaly, and peripheral edema. Which of the following best explains the
mechanism of these findings?
A) Increased left ventricular end-diastolic pressure with pulmonary congestion
B) Reduced cardiac output leading to renal sodium and water retention
C) Increased systemic venous pressure due to right ventricular failure
D) Decreased hepatic blood flow causing impaired albumin synthesis
CORRECT ANSWER: C
Rationale: Right-sided heart failure results from the right ventricle's inability to eject
blood effectively, leading to increased right ventricular end-diastolic pressure. This
pressure is transmitted backward to the systemic venous system, causing jugular venous
distension, hepatic congestion (hepatomegaly), and peripheral edema due to
increased capillary hydrostatic pressure . Option A describes left-sided failure. Option B
describes a compensatory mechanism but not the direct cause. Option D is a
consequence of hepatic congestion, not the primary mechanism.
5. A 72-year-old patient with a history of hypertension and diabetes presents with
sudden onset of severe, tearing chest pain radiating to the back. Blood pressure is
180/100 mmHg in the right arm and 140/80 mmHg in the left arm. Which condition is
most likely?
A) Acute myocardial infarction
B) Pulmonary embolism
C) Aortic dissection
D) Pericarditis
CORRECT ANSWER: C
Rationale: Aortic dissection presents with sudden, severe "tearing" chest pain that may
radiate to the back. Blood pressure differences between arms are a classic sign due to
, involvement of the aortic arch and branch vessels. Risk factors include hypertension
and connective tissue disorders. The presentation is distinct from MI, which typically
causes pressure-like pain, and PE, which causes pleuritic pain and dyspnea .
6. Which pathophysiological mechanism is responsible for the systolic ejection murmur
heard in a patient with aortic stenosis?
A) Turbulent blood flow across the stenotic mitral valve during diastole
B) Turbulent blood flow across the stenotic aortic valve during ventricular systole
C) Regurgitant flow across the mitral valve during systole
D) Increased flow velocity across a normal aortic valve due to high cardiac output
CORRECT ANSWER: B
Rationale: Aortic stenosis causes obstruction to left ventricular outflow during systole. As
blood is ejected through the narrowed aortic valve, turbulence is created, producing a
systolic ejection murmur best heard at the right upper sternal border with radiation to
the carotid arteries . Option A describes mitral stenosis. Option C describes mitral
regurgitation. Option D describes a flow murmur, not pathologic stenosis.
7. A patient with chronic hypertension develops left ventricular hypertrophy. This
adaptation is best described as:
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
CORRECT ANSWER: C
Rationale: Left ventricular hypertrophy is a form of physiologic or pathologic
hypertrophy—an increase in cell size due to increased workload. The cardiomyocytes
Pathophysiology – (2026) Chamberlain
University – Actual Questions &Correct
Answers with In-Depth Rationales !
SECTION 1: CARDIOVASCULAR PATHOPHYSIOLOGY (Questions 1-30)
1. A 68-year-old male with a history of hypertension presents with progressive dyspnea
on exertion, orthopnea, and paroxysmal nocturnal dyspnea. Which pathophysiological
mechanism best explains these symptoms?
A) Decreased cardiac output leading to systemic hypoperfusion
B) Increased pulmonary capillary hydrostatic pressure causing interstitial and alveolar
edema
C) Reduced renal perfusion activating the renin-angiotensin-aldosterone system
D) Impaired peripheral vasodilation response to exercise
CORRECT ANSWER: B
Rationale: Left-sided heart failure results in increased left ventricular end-diastolic
pressure, which is transmitted backward to the pulmonary vasculature. This increases
pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial space and
alveoli, causing the classic symptoms of dyspnea, orthopnea, and PND . Option A
describes low-output states but does not explain pulmonary symptoms directly. Option
C describes a compensatory mechanism rather than the primary pathophysiological
cause. Option D is characteristic of other conditions.
2. A patient with chronic heart failure has been prescribed an ACE inhibitor. What is the
primary therapeutic mechanism of this drug class in heart failure management?
A) Blocking beta-1 adrenergic receptors to reduce heart rate and contractility
,B) Preventing the conversion of angiotensin I to angiotensin II, reducing vasoconstriction
and aldosterone release
C) Inhibiting phosphodiesterase to increase intracellular cAMP and cardiac contractility
D) Blocking calcium channels to reduce afterload and myocardial oxygen demand
CORRECT ANSWER: B
Rationale: ACE inhibitors block the conversion of angiotensin I to angiotensin II, a potent
vasoconstrictor that also stimulates aldosterone release. This reduces afterload,
preload, and sodium/water retention, improving cardiac output and reducing
symptoms . Option A describes beta-blockers. Option C describes inotropes like
milrinone. Option D describes calcium channel blockers.
3. A 55-year-old female presents with acute-onset chest pain radiating to her left arm,
accompanied by diaphoresis and nausea. An ECG shows ST-segment elevation in
leads V1-V4. Which of the following is the most appropriate immediate intervention?
A) Administration of sublingual nitroglycerin and observation
B) Immediate percutaneous coronary intervention (PCI)
C) Intravenous thrombolytic therapy with alteplase
D) Administration of oral aspirin and beta-blocker therapy
CORRECT ANSWER: B
Rationale: ST-segment elevation myocardial infarction (STEMI) requires immediate
reperfusion therapy. PCI is the preferred method if available within 90 minutes of first
medical contact. It directly restores coronary blood flow by opening the occluded
vessel. Thrombolytics are an alternative if PCI is not available within the recommended
time frame. Aspirin is an adjunct therapy, not the primary intervention . The ST elevation
in V1-V4 indicates an anterior MI, which carries high mortality risk and requires urgent
intervention.
,4. A patient with right-sided heart failure exhibits jugular venous distension,
hepatomegaly, and peripheral edema. Which of the following best explains the
mechanism of these findings?
A) Increased left ventricular end-diastolic pressure with pulmonary congestion
B) Reduced cardiac output leading to renal sodium and water retention
C) Increased systemic venous pressure due to right ventricular failure
D) Decreased hepatic blood flow causing impaired albumin synthesis
CORRECT ANSWER: C
Rationale: Right-sided heart failure results from the right ventricle's inability to eject
blood effectively, leading to increased right ventricular end-diastolic pressure. This
pressure is transmitted backward to the systemic venous system, causing jugular venous
distension, hepatic congestion (hepatomegaly), and peripheral edema due to
increased capillary hydrostatic pressure . Option A describes left-sided failure. Option B
describes a compensatory mechanism but not the direct cause. Option D is a
consequence of hepatic congestion, not the primary mechanism.
5. A 72-year-old patient with a history of hypertension and diabetes presents with
sudden onset of severe, tearing chest pain radiating to the back. Blood pressure is
180/100 mmHg in the right arm and 140/80 mmHg in the left arm. Which condition is
most likely?
A) Acute myocardial infarction
B) Pulmonary embolism
C) Aortic dissection
D) Pericarditis
CORRECT ANSWER: C
Rationale: Aortic dissection presents with sudden, severe "tearing" chest pain that may
radiate to the back. Blood pressure differences between arms are a classic sign due to
, involvement of the aortic arch and branch vessels. Risk factors include hypertension
and connective tissue disorders. The presentation is distinct from MI, which typically
causes pressure-like pain, and PE, which causes pleuritic pain and dyspnea .
6. Which pathophysiological mechanism is responsible for the systolic ejection murmur
heard in a patient with aortic stenosis?
A) Turbulent blood flow across the stenotic mitral valve during diastole
B) Turbulent blood flow across the stenotic aortic valve during ventricular systole
C) Regurgitant flow across the mitral valve during systole
D) Increased flow velocity across a normal aortic valve due to high cardiac output
CORRECT ANSWER: B
Rationale: Aortic stenosis causes obstruction to left ventricular outflow during systole. As
blood is ejected through the narrowed aortic valve, turbulence is created, producing a
systolic ejection murmur best heard at the right upper sternal border with radiation to
the carotid arteries . Option A describes mitral stenosis. Option C describes mitral
regurgitation. Option D describes a flow murmur, not pathologic stenosis.
7. A patient with chronic hypertension develops left ventricular hypertrophy. This
adaptation is best described as:
A) Hyperplasia
B) Metaplasia
C) Hypertrophy
D) Dysplasia
CORRECT ANSWER: C
Rationale: Left ventricular hypertrophy is a form of physiologic or pathologic
hypertrophy—an increase in cell size due to increased workload. The cardiomyocytes
