AACN CMC CARDIAC MEDICINE
CERTIFICATION EXAM PREP
2026/2027: 300 REAL EXAM
QUESTIONS WITH VERIFIED
CORRECT ANSWERS & DETAILED
RATIONALES | TEST BANK
Domain I: Cardiovascular Conditions (Approx. 69 Questions)
1. A patient with an inferior STEMI becomes hypotensive after receiving
sublingual nitroglycerin. Examination reveals elevated jugular venous pressure,
clear lung fields, and hypotension. Which complication is most likely?
A) Acute mitral regurgitation
B) Left ventricular free-wall rupture
C) Right ventricular infarction
D) Ventricular septal rupture
Answer: C. Right ventricular infarction.
Rationale: Right ventricular infarction impairs right-sided output, leading to
hypotension, elevated JVP, and clear lungs. Preload-reducing drugs like nitrates can
worsen hypotension by reducing venous return to the already failing right ventricle .
2. A patient with severe aortic stenosis develops syncope during exertion. What
mechanism best explains this presentation?
A) Increased coronary venous return
B) Inability to increase cardiac output adequately during exertion
C) Excessive left ventricular preload
D) Acute right ventricular failure
Answer: B. Inability to increase cardiac output adequately during exertion.
Rationale: Severe fixed outflow obstruction from aortic stenosis limits the ability to
augment cardiac output during exercise. Exertional syncope is a classic manifestation
of severe symptomatic aortic stenosis .
3. Which ECG finding is most characteristic of early hyperkalemia?
A) Prolonged QT interval
B) Prominent U waves
,C) Tall, narrow, peaked T waves
D) Diffuse ST elevation
Answer: C. Tall, narrow, peaked T waves.
Rationale: Early hyperkalemia commonly causes tall, peaked T waves. Progressive
hyperkalemia can produce PR prolongation, QRS widening, loss of P waves, and
eventually a sine-wave pattern .
4. A patient with a myocardial infarction develops a new systolic murmur heard
best at the apex. What is the most likely cause?
A) Papillary muscle rupture
B) Ventricular septal defect
C) Pericarditis
D) Aortic stenosis
Answer: A. Papillary muscle rupture.
Rationale: Papillary muscle rupture is a complication of MI causing acute mitral
regurgitation. The murmur is holosystolic and best heard at the apex. A VSD causes a
murmur at the left sternal border, and pericarditis causes a friction rub .
5. Which finding is most characteristic of right-sided heart failure?
A) Crackles in the lung bases
B) Jugular venous distension and peripheral edema
C) Orthopnea
D) Paroxysmal nocturnal dyspnea
Answer: B. Jugular venous distension and peripheral edema.
Rationale: JVD and peripheral edema are hallmarks of right-sided heart failure,
resulting from fluid backing up into the systemic venous system. Crackles, orthopnea,
and PND are signs of left-sided heart failure .
6. During cardiac auscultation, a harsh systolic murmur best heard at the right
upper sternal border radiating to the carotids suggests which diagnosis?
A) Mitral regurgitation
B) Aortic stenosis
C) Mitral stenosis
D) Aortic regurgitation
Answer: B. Aortic stenosis.
Rationale: Classic findings of aortic stenosis include a systolic murmur radiating to the
carotids due to turbulent flow across a narrowed valve .
7. A patient with infective endocarditis is most likely to have which organism
identified if they have a history of intravenous drug use?
A) Streptococcus viridans
B) Staphylococcus aureus
C) Enterococcus faecalis
D) Staphylococcus epidermidis
,Answer: B. Staphylococcus aureus.
Rationale: IV drug users are at high risk for S. aureus endocarditis, particularly affecting
the tricuspid valve .
8. A patient develops sudden onset dyspnea, hypotension, and jugular venous
distention following a myocardial infarction. What complication should be
suspected urgently?
A) Pulmonary embolism
B) Cardiac tamponade
C) Aortic dissection
D) Tension pneumothorax
Answer: B. Cardiac tamponade.
Rationale: These findings indicate obstructive shock due to pericardial fluid
accumulation impairing cardiac filling. Free-wall rupture after MI can lead to
hemopericardium and tamponade .
9. Which type of myocardial infarction is most commonly associated with
occlusion of the left circumflex artery?
A) Anterior wall MI
B) Inferior wall MI
C) Lateral wall MI
D) Septal wall MI
Answer: C. Lateral wall MI.
Rationale: LCX occlusion typically causes a lateral wall MI, with ECG changes in leads I,
aVL, V5, and V6. The LAD causes anterior MI, and the RCA causes inferior MI .
10. A patient with acute decompensated heart failure has pulmonary edema,
elevated systemic vascular resistance, and a blood pressure of 178/104 mmHg.
Which hemodynamic intervention is most appropriate initially?
A) Rapid isotonic fluid administration
B) Afterload reduction with an intravenous vasodilator
C) Immediate beta-blocker escalation
D) Dopamine infusion
Answer: B. Afterload reduction with an intravenous vasodilator.
Rationale: In hypertensive acute pulmonary edema, excessive afterload increases left
ventricular filling pressures and worsens pulmonary congestion. Intravenous
vasodilators can rapidly reduce preload and/or afterload when blood pressure permits .
11. A patient with a history of heart failure with reduced ejection fraction
(HFrEF) presents with acute decompensation. Which chronic medication should
typically be held in the acute setting due to the risk of worsening hypotension?
A) Furosemide
B) Sacubitril/valsartan
C) Digoxin
, D) Carvedilol
Answer: B. Sacubitril/valsartan.
Rationale: In acute decompensated HF, medications that lower blood pressure
significantly, such as ARNIs (sacubitril/valsartan) or ACE inhibitors, are often held until
the patient is hemodynamically stable, especially if hypotensive.
12. A patient presents with crushing substernal chest pain radiating to the left
arm and jaw for 30 minutes. What is the most appropriate immediate
pharmacologic intervention?
A) Sublingual nitroglycerin
B) Intravenous morphine
C) Aspirin
D) Intravenous metoprolol
Answer: C. Aspirin.
Rationale: Aspirin inhibits platelet aggregation and should be given immediately in
suspected acute coronary syndrome to reduce mortality. It is a foundational therapy in
all ACS algorithms .
13. Which ECG lead group is most useful for identifying an acute inferior wall
myocardial infarction?
A) V1–V4
B) I, aVL, V5, V6
C) II, III, aVF
D) V7–V9
Answer: C. II, III, aVF.
Rationale: Leads II, III, and aVF look at the inferior wall of the left ventricle. ST elevation
in these leads indicates an inferior STEMI, often due to RCA or LCX occlusion .
14. A patient with a known thoracic aortic aneurysm presents with sudden,
ripping chest pain radiating to the back. Which finding is most concerning for
aortic dissection?
A) Blood pressure difference between arms
B) Bilateral crackles
C) S3 gallop
D) pulsus paradoxus
Answer: A. Blood pressure difference between arms.
Rationale: A significant blood pressure differential between the arms is a classic sign of
aortic dissection involving the subclavian artery. It indicates malperfusion.
15. Which valvular lesion is most likely to cause a diastolic murmur?
A) Aortic stenosis
B) Mitral stenosis
C) Mitral regurgitation
D) Tricuspid regurgitation
CERTIFICATION EXAM PREP
2026/2027: 300 REAL EXAM
QUESTIONS WITH VERIFIED
CORRECT ANSWERS & DETAILED
RATIONALES | TEST BANK
Domain I: Cardiovascular Conditions (Approx. 69 Questions)
1. A patient with an inferior STEMI becomes hypotensive after receiving
sublingual nitroglycerin. Examination reveals elevated jugular venous pressure,
clear lung fields, and hypotension. Which complication is most likely?
A) Acute mitral regurgitation
B) Left ventricular free-wall rupture
C) Right ventricular infarction
D) Ventricular septal rupture
Answer: C. Right ventricular infarction.
Rationale: Right ventricular infarction impairs right-sided output, leading to
hypotension, elevated JVP, and clear lungs. Preload-reducing drugs like nitrates can
worsen hypotension by reducing venous return to the already failing right ventricle .
2. A patient with severe aortic stenosis develops syncope during exertion. What
mechanism best explains this presentation?
A) Increased coronary venous return
B) Inability to increase cardiac output adequately during exertion
C) Excessive left ventricular preload
D) Acute right ventricular failure
Answer: B. Inability to increase cardiac output adequately during exertion.
Rationale: Severe fixed outflow obstruction from aortic stenosis limits the ability to
augment cardiac output during exercise. Exertional syncope is a classic manifestation
of severe symptomatic aortic stenosis .
3. Which ECG finding is most characteristic of early hyperkalemia?
A) Prolonged QT interval
B) Prominent U waves
,C) Tall, narrow, peaked T waves
D) Diffuse ST elevation
Answer: C. Tall, narrow, peaked T waves.
Rationale: Early hyperkalemia commonly causes tall, peaked T waves. Progressive
hyperkalemia can produce PR prolongation, QRS widening, loss of P waves, and
eventually a sine-wave pattern .
4. A patient with a myocardial infarction develops a new systolic murmur heard
best at the apex. What is the most likely cause?
A) Papillary muscle rupture
B) Ventricular septal defect
C) Pericarditis
D) Aortic stenosis
Answer: A. Papillary muscle rupture.
Rationale: Papillary muscle rupture is a complication of MI causing acute mitral
regurgitation. The murmur is holosystolic and best heard at the apex. A VSD causes a
murmur at the left sternal border, and pericarditis causes a friction rub .
5. Which finding is most characteristic of right-sided heart failure?
A) Crackles in the lung bases
B) Jugular venous distension and peripheral edema
C) Orthopnea
D) Paroxysmal nocturnal dyspnea
Answer: B. Jugular venous distension and peripheral edema.
Rationale: JVD and peripheral edema are hallmarks of right-sided heart failure,
resulting from fluid backing up into the systemic venous system. Crackles, orthopnea,
and PND are signs of left-sided heart failure .
6. During cardiac auscultation, a harsh systolic murmur best heard at the right
upper sternal border radiating to the carotids suggests which diagnosis?
A) Mitral regurgitation
B) Aortic stenosis
C) Mitral stenosis
D) Aortic regurgitation
Answer: B. Aortic stenosis.
Rationale: Classic findings of aortic stenosis include a systolic murmur radiating to the
carotids due to turbulent flow across a narrowed valve .
7. A patient with infective endocarditis is most likely to have which organism
identified if they have a history of intravenous drug use?
A) Streptococcus viridans
B) Staphylococcus aureus
C) Enterococcus faecalis
D) Staphylococcus epidermidis
,Answer: B. Staphylococcus aureus.
Rationale: IV drug users are at high risk for S. aureus endocarditis, particularly affecting
the tricuspid valve .
8. A patient develops sudden onset dyspnea, hypotension, and jugular venous
distention following a myocardial infarction. What complication should be
suspected urgently?
A) Pulmonary embolism
B) Cardiac tamponade
C) Aortic dissection
D) Tension pneumothorax
Answer: B. Cardiac tamponade.
Rationale: These findings indicate obstructive shock due to pericardial fluid
accumulation impairing cardiac filling. Free-wall rupture after MI can lead to
hemopericardium and tamponade .
9. Which type of myocardial infarction is most commonly associated with
occlusion of the left circumflex artery?
A) Anterior wall MI
B) Inferior wall MI
C) Lateral wall MI
D) Septal wall MI
Answer: C. Lateral wall MI.
Rationale: LCX occlusion typically causes a lateral wall MI, with ECG changes in leads I,
aVL, V5, and V6. The LAD causes anterior MI, and the RCA causes inferior MI .
10. A patient with acute decompensated heart failure has pulmonary edema,
elevated systemic vascular resistance, and a blood pressure of 178/104 mmHg.
Which hemodynamic intervention is most appropriate initially?
A) Rapid isotonic fluid administration
B) Afterload reduction with an intravenous vasodilator
C) Immediate beta-blocker escalation
D) Dopamine infusion
Answer: B. Afterload reduction with an intravenous vasodilator.
Rationale: In hypertensive acute pulmonary edema, excessive afterload increases left
ventricular filling pressures and worsens pulmonary congestion. Intravenous
vasodilators can rapidly reduce preload and/or afterload when blood pressure permits .
11. A patient with a history of heart failure with reduced ejection fraction
(HFrEF) presents with acute decompensation. Which chronic medication should
typically be held in the acute setting due to the risk of worsening hypotension?
A) Furosemide
B) Sacubitril/valsartan
C) Digoxin
, D) Carvedilol
Answer: B. Sacubitril/valsartan.
Rationale: In acute decompensated HF, medications that lower blood pressure
significantly, such as ARNIs (sacubitril/valsartan) or ACE inhibitors, are often held until
the patient is hemodynamically stable, especially if hypotensive.
12. A patient presents with crushing substernal chest pain radiating to the left
arm and jaw for 30 minutes. What is the most appropriate immediate
pharmacologic intervention?
A) Sublingual nitroglycerin
B) Intravenous morphine
C) Aspirin
D) Intravenous metoprolol
Answer: C. Aspirin.
Rationale: Aspirin inhibits platelet aggregation and should be given immediately in
suspected acute coronary syndrome to reduce mortality. It is a foundational therapy in
all ACS algorithms .
13. Which ECG lead group is most useful for identifying an acute inferior wall
myocardial infarction?
A) V1–V4
B) I, aVL, V5, V6
C) II, III, aVF
D) V7–V9
Answer: C. II, III, aVF.
Rationale: Leads II, III, and aVF look at the inferior wall of the left ventricle. ST elevation
in these leads indicates an inferior STEMI, often due to RCA or LCX occlusion .
14. A patient with a known thoracic aortic aneurysm presents with sudden,
ripping chest pain radiating to the back. Which finding is most concerning for
aortic dissection?
A) Blood pressure difference between arms
B) Bilateral crackles
C) S3 gallop
D) pulsus paradoxus
Answer: A. Blood pressure difference between arms.
Rationale: A significant blood pressure differential between the arms is a classic sign of
aortic dissection involving the subclavian artery. It indicates malperfusion.
15. Which valvular lesion is most likely to cause a diastolic murmur?
A) Aortic stenosis
B) Mitral stenosis
C) Mitral regurgitation
D) Tricuspid regurgitation
