APEA 3P Mastery Exam Questions and Verified
Correct Answers 2026
Question 1: A 65-year-old male with a 40-pack-year smoking history presents with
complaints of bilateral calf pain when walking approximately one block. The pain
resolves with rest. Which pathophysiologic mechanism is most likely responsible for
these symptoms?
A) Venous stasis causing tissue edema
B) Atherosclerotic plaque formation leading to arterial lumen narrowing
C) Autoimmune inflammation of small vessel walls
D) Neurogenic compression of spinal nerve roots
Correct Answer: B) Atherosclerotic plaque formation leading to arterial lumen
narrowing
Rationale: Intermittent claudication is the hallmark symptom of peripheral arterial
disease (PAD). The pathophysiology involves atherosclerosis causing progressive
narrowing of arterial lumens in the lower extremities. During exercise, increased oxygen
demand cannot be met due to limited blood flow, resulting in ischemic muscle pain that
resolves with rest when oxygen demand decreases. Smoking is a major risk factor as
nicotine promotes endothelial dysfunction and accelerates atherogenesis .
Question 2: A patient with chronic heart failure presents with worsening dyspnea,
jugular venous distension, and lower extremity edema. Which pathophysiologic
mechanism is most directly responsible for these findings?
,A) Reduced myocardial contractility leading to decreased cardiac output
B) Increased left ventricular end-diastolic pressure causing backward failure
C) Activation of the sympathetic nervous system causing tachycardia
D) Ventricular remodeling with hypertrophy of myocytes
Correct Answer: B) Increased left ventricular end-diastolic pressure causing
backward failure
Rationale: In chronic heart failure, reduced cardiac output leads to compensatory fluid
retention and increased filling pressures. Elevated left ventricular end-diastolic pressure
transmits backward into the left atrium and pulmonary circulation, eventually causing
systemic venous congestion as evidenced by JVD and peripheral edema. While reduced
contractility initiates the process, the specific findings of congestion result directly from
elevated filling pressures .
Question 3: A 72-year-old female with heart failure presents with worsening dyspnea,
orthopnea, and 3+ pitting edema in both lower extremities. Which medication is most
likely to reduce mortality in this patient?
A) Furosemide
B) Metolazone
C) Sacubitril-valsartan
D) Digoxin
Correct Answer: C) Sacubitril-valsartan
Rationale: The PARADIGM-HF trial demonstrated that sacubitril-valsartan reduced
cardiovascular death and heart failure hospitalization more effectively than enalapril,
making it the preferred first-line therapy for HFrEF. Sacubitril is a neprilysin inhibitor that
,increases natriuretic peptide levels, while valsartan blocks angiotensin II receptors,
providing complementary hemodynamic benefits .
Question 4: A patient on warfarin therapy for atrial fibrillation presents with an INR of
6.5. The patient reports no bleeding symptoms. What is the most appropriate
management?
A) Administer fresh frozen plasma immediately
B) Hold warfarin and administer oral vitamin K 1-2.5 mg
C) Continue warfarin at same dose and recheck INR in 1 week
D) Administer intravenous vitamin K 10 mg
Correct Answer: B) Hold warfarin and administer oral vitamin K 1-2.5 mg
Rationale: For INR >4.5 without major bleeding, low-dose oral vitamin K (≤2.5 mg) is
recommended to gently lower INR without causing hypercoagulability. Higher doses of
vitamin K or intravenous administration can cause warfarin resistance for days to weeks.
Fresh frozen plasma is reserved for active bleeding or life-threatening elevations .
Question 5: A patient with hypertension has well-controlled blood pressure but
develops a persistent dry cough. Which antihypertensive medication is most likely
responsible?
A) Hydrochlorothiazide
B) Amlodipine
C) Lisinopril
D) Metoprolol
, Correct Answer: C) Lisinopril
Rationale: ACE inhibitors like lisinopril commonly cause a dry, persistent cough due to
accumulation of bradykinin and substance P in the airway. This occurs because ACE
normally degrades these peptides. The cough typically resolves within 1-4 weeks after
discontinuing the medication and is not dose-dependent .
Question 6: The NP auscultates a harsh, crescendo-decrescendo murmur at the right
second intercostal space that radiates to the carotids. This finding is most consistent
with:
A) Mitral regurgitation
B) Aortic stenosis
C) Pulmonic stenosis
D) Ventricular septal defect
Correct Answer: B) Aortic stenosis
Rationale: Aortic stenosis produces a characteristic systolic ejection murmur heard best
at the right second intercostal space (aortic area) with radiation to the carotids. The
murmur is harsh, crescendo-decrescendo, and often associated with a weakened and
delayed carotid upstroke (pulsus parvus et tardus) in significant stenosis .
Question 7: A 50-year-old male presents with acute onset of severe, tearing chest pain
radiating to the back. Blood pressure is 150/90 mmHg in the right arm and 100/60
mmHg in the left arm. ECG shows no ST-segment elevation. What is the most likely
diagnosis?
Correct Answers 2026
Question 1: A 65-year-old male with a 40-pack-year smoking history presents with
complaints of bilateral calf pain when walking approximately one block. The pain
resolves with rest. Which pathophysiologic mechanism is most likely responsible for
these symptoms?
A) Venous stasis causing tissue edema
B) Atherosclerotic plaque formation leading to arterial lumen narrowing
C) Autoimmune inflammation of small vessel walls
D) Neurogenic compression of spinal nerve roots
Correct Answer: B) Atherosclerotic plaque formation leading to arterial lumen
narrowing
Rationale: Intermittent claudication is the hallmark symptom of peripheral arterial
disease (PAD). The pathophysiology involves atherosclerosis causing progressive
narrowing of arterial lumens in the lower extremities. During exercise, increased oxygen
demand cannot be met due to limited blood flow, resulting in ischemic muscle pain that
resolves with rest when oxygen demand decreases. Smoking is a major risk factor as
nicotine promotes endothelial dysfunction and accelerates atherogenesis .
Question 2: A patient with chronic heart failure presents with worsening dyspnea,
jugular venous distension, and lower extremity edema. Which pathophysiologic
mechanism is most directly responsible for these findings?
,A) Reduced myocardial contractility leading to decreased cardiac output
B) Increased left ventricular end-diastolic pressure causing backward failure
C) Activation of the sympathetic nervous system causing tachycardia
D) Ventricular remodeling with hypertrophy of myocytes
Correct Answer: B) Increased left ventricular end-diastolic pressure causing
backward failure
Rationale: In chronic heart failure, reduced cardiac output leads to compensatory fluid
retention and increased filling pressures. Elevated left ventricular end-diastolic pressure
transmits backward into the left atrium and pulmonary circulation, eventually causing
systemic venous congestion as evidenced by JVD and peripheral edema. While reduced
contractility initiates the process, the specific findings of congestion result directly from
elevated filling pressures .
Question 3: A 72-year-old female with heart failure presents with worsening dyspnea,
orthopnea, and 3+ pitting edema in both lower extremities. Which medication is most
likely to reduce mortality in this patient?
A) Furosemide
B) Metolazone
C) Sacubitril-valsartan
D) Digoxin
Correct Answer: C) Sacubitril-valsartan
Rationale: The PARADIGM-HF trial demonstrated that sacubitril-valsartan reduced
cardiovascular death and heart failure hospitalization more effectively than enalapril,
making it the preferred first-line therapy for HFrEF. Sacubitril is a neprilysin inhibitor that
,increases natriuretic peptide levels, while valsartan blocks angiotensin II receptors,
providing complementary hemodynamic benefits .
Question 4: A patient on warfarin therapy for atrial fibrillation presents with an INR of
6.5. The patient reports no bleeding symptoms. What is the most appropriate
management?
A) Administer fresh frozen plasma immediately
B) Hold warfarin and administer oral vitamin K 1-2.5 mg
C) Continue warfarin at same dose and recheck INR in 1 week
D) Administer intravenous vitamin K 10 mg
Correct Answer: B) Hold warfarin and administer oral vitamin K 1-2.5 mg
Rationale: For INR >4.5 without major bleeding, low-dose oral vitamin K (≤2.5 mg) is
recommended to gently lower INR without causing hypercoagulability. Higher doses of
vitamin K or intravenous administration can cause warfarin resistance for days to weeks.
Fresh frozen plasma is reserved for active bleeding or life-threatening elevations .
Question 5: A patient with hypertension has well-controlled blood pressure but
develops a persistent dry cough. Which antihypertensive medication is most likely
responsible?
A) Hydrochlorothiazide
B) Amlodipine
C) Lisinopril
D) Metoprolol
, Correct Answer: C) Lisinopril
Rationale: ACE inhibitors like lisinopril commonly cause a dry, persistent cough due to
accumulation of bradykinin and substance P in the airway. This occurs because ACE
normally degrades these peptides. The cough typically resolves within 1-4 weeks after
discontinuing the medication and is not dose-dependent .
Question 6: The NP auscultates a harsh, crescendo-decrescendo murmur at the right
second intercostal space that radiates to the carotids. This finding is most consistent
with:
A) Mitral regurgitation
B) Aortic stenosis
C) Pulmonic stenosis
D) Ventricular septal defect
Correct Answer: B) Aortic stenosis
Rationale: Aortic stenosis produces a characteristic systolic ejection murmur heard best
at the right second intercostal space (aortic area) with radiation to the carotids. The
murmur is harsh, crescendo-decrescendo, and often associated with a weakened and
delayed carotid upstroke (pulsus parvus et tardus) in significant stenosis .
Question 7: A 50-year-old male presents with acute onset of severe, tearing chest pain
radiating to the back. Blood pressure is 150/90 mmHg in the right arm and 100/60
mmHg in the left arm. ECG shows no ST-segment elevation. What is the most likely
diagnosis?
