2026/2027 ACS Board Exam Prep: 70
Practice Questions on Acute Coronary
Syndrome (Myocardial Infarction, STEMI,
NSTEMI) Management & ECG Mastery
Description:
Master ACS for your 2026/2027 exams. Get 70 updated practice questions with detailed
explanations on MI pathophysiology, STEMI/NSTEMI guidelines, ECG interpretation,
pharmacology (nitroglycerin, ticagrelor), and shock management. Ideal for USMLE,
NCLEX, and ACLS review.
Download your free high-yield study guide now and ace your test.
, Acute Coronary Syndrome (ACS) Exam Questions & Answers
2026/2027
Section 1: Pathophysiology and Clinical Presentation of ACS
1. Which of the following pathophysiological processes is a direct contributor to the spectrum of
Acute Coronary Syndromes?
A. Chronic atrial dilation
B. Development of an occlusive intracoronary thrombus
C. Systemic inflammatory vasculitis
D. Valvular calcification
Answer: B
Explanation: The central event in ACS is coronary plaque disruption (rupture or erosion)
followed by thrombus formation. An occlusive or subocclusive thrombus is the primary
pathological mechanism leading to myocardial ischemia or infarction, distinguishing it from
other cardiac conditions.
2. A 58-year-old male describes his chest discomfort as a pressure-like sensation in the
substernal region that radiates to his left arm and jaw. The discomfort comes and goes, with each
episode lasting approximately 8 minutes. Which descriptors are most consistent with ischemic
cardiac pain?
A. Pleuritic, sharp, and positional
B. Pressure, radiating, intermittent, and lasting >3-5 minutes
C. Localized, reproducible with palpation, and brief (<30 seconds)
D. Burning, episodic, and relieved by antacids
Answer: B
Explanation: Typical ischemic pain is often described as pressure, tightness, squeezing, or
aching. It is frequently retrosternal, may radiate to the arms, neck, jaw, or back, and is typically
not fleeting. Episodes lasting longer than 3-5 minutes are a key characteristic differentiating it
from benign musculoskeletal causes.
,3. Beyond acute myocardial infarction, which of the following should be urgently considered as
life-threatening causes of acute chest pain in the differential diagnosis?
A. Gastroesophageal reflux disease and costochondritis
B. Pulmonary embolism, aortic dissection, and tension pneumothorax
C. Peptic ulcer disease and pancreatitis
D. Pericarditis and myocarditis
Answer: B
Explanation: While pericarditis and myocarditis (D) are important, the listed conditions in B
represent critical, immediately life-threatening diagnoses that mandate rapid identification and
specific management, as they can mimic ACS and have high mortality if missed.
4. During the physical examination of a patient with suspected ACS and left ventricular
dysfunction, which finding would be most indicative of developing pulmonary congestion?
A. Presence of a third heart sound (S3 gallop)
B. Hologystolic murmur at the apex
C. Bibasilar inspiratory crackles (rales)
D. Elevated jugular venous pressure
Answer: C
Explanation: While all choices can indicate cardiac dysfunction, bibasilar crackles are a direct
auscultatory sign of fluid transudation into the alveoli due to increased left ventricular filling
pressures, a hallmark of acute pulmonary edema.
Section 2: Electrocardiographic Diagnosis in ACS
5. According to current diagnostic criteria, which finding on a 12-lead ECG is diagnostic for ST-
segment elevation myocardial infarction (STEMI) in a male patient aged 40 years or older?
A. ST-segment depression of 1 mm in leads V5 and V6
B. New ST-segment elevation ≥ 0.2 mV (2 mm) at the J-point in contiguous leads V2 and V3
C. T-wave inversion ≥ 3 mm in leads II, III, and aVF
D. New left bundle branch block
, Answer: B
Explanation: For men ≥40, the threshold for significant ST-elevation in leads V2-V3 is 2 mm
(0.2 mV). This is a key sex and lead-specific criterion for diagnosing STEMI and activating the
catheterization lab for emergent reperfusion.
6. Which constellation of ECG findings is most indicative of a high-risk Non-ST-Segment
Elevation ACS (NSTE-ACS)?
A. Sinus tachycardia with occasional PVCs
B. Transient, dynamic ST-segment depression ≥ 0.5 mm and/or deep T-wave inversion in two or
more contiguous leads
C. Stable, long-standing Q-waves in anterior leads
D. First-degree atrioventricular block
Answer: B
Explanation: Dynamic, widespread ST-segment changes (depression or transient elevation) and
deep T-wave inversion reflect significant ongoing ischemia and are markers of high-risk NSTE-
ACS, guiding aggressive medical and invasive management.
7. A patient presents with chest pain. Their ECG shows T-wave inversion of 1.5 mm in leads V4
and V5, with no ST-segment elevation. This presentation would be classified as:
A. ST-segment elevation myocardial infarction (STEMI)
B. Stable angina pectoris
C. Low- or intermediate-risk Non-ST-Elevation ACS (NSTE-ACS)
D. Pericarditis
Answer: C
Explanation: Isolated T-wave inversion, especially of a lesser magnitude and without dynamic
symptoms, is often associated with lower-risk presentations. However, it still places the patient
in an NSTE-ACS category, requiring serial troponins and risk stratification.
Practice Questions on Acute Coronary
Syndrome (Myocardial Infarction, STEMI,
NSTEMI) Management & ECG Mastery
Description:
Master ACS for your 2026/2027 exams. Get 70 updated practice questions with detailed
explanations on MI pathophysiology, STEMI/NSTEMI guidelines, ECG interpretation,
pharmacology (nitroglycerin, ticagrelor), and shock management. Ideal for USMLE,
NCLEX, and ACLS review.
Download your free high-yield study guide now and ace your test.
, Acute Coronary Syndrome (ACS) Exam Questions & Answers
2026/2027
Section 1: Pathophysiology and Clinical Presentation of ACS
1. Which of the following pathophysiological processes is a direct contributor to the spectrum of
Acute Coronary Syndromes?
A. Chronic atrial dilation
B. Development of an occlusive intracoronary thrombus
C. Systemic inflammatory vasculitis
D. Valvular calcification
Answer: B
Explanation: The central event in ACS is coronary plaque disruption (rupture or erosion)
followed by thrombus formation. An occlusive or subocclusive thrombus is the primary
pathological mechanism leading to myocardial ischemia or infarction, distinguishing it from
other cardiac conditions.
2. A 58-year-old male describes his chest discomfort as a pressure-like sensation in the
substernal region that radiates to his left arm and jaw. The discomfort comes and goes, with each
episode lasting approximately 8 minutes. Which descriptors are most consistent with ischemic
cardiac pain?
A. Pleuritic, sharp, and positional
B. Pressure, radiating, intermittent, and lasting >3-5 minutes
C. Localized, reproducible with palpation, and brief (<30 seconds)
D. Burning, episodic, and relieved by antacids
Answer: B
Explanation: Typical ischemic pain is often described as pressure, tightness, squeezing, or
aching. It is frequently retrosternal, may radiate to the arms, neck, jaw, or back, and is typically
not fleeting. Episodes lasting longer than 3-5 minutes are a key characteristic differentiating it
from benign musculoskeletal causes.
,3. Beyond acute myocardial infarction, which of the following should be urgently considered as
life-threatening causes of acute chest pain in the differential diagnosis?
A. Gastroesophageal reflux disease and costochondritis
B. Pulmonary embolism, aortic dissection, and tension pneumothorax
C. Peptic ulcer disease and pancreatitis
D. Pericarditis and myocarditis
Answer: B
Explanation: While pericarditis and myocarditis (D) are important, the listed conditions in B
represent critical, immediately life-threatening diagnoses that mandate rapid identification and
specific management, as they can mimic ACS and have high mortality if missed.
4. During the physical examination of a patient with suspected ACS and left ventricular
dysfunction, which finding would be most indicative of developing pulmonary congestion?
A. Presence of a third heart sound (S3 gallop)
B. Hologystolic murmur at the apex
C. Bibasilar inspiratory crackles (rales)
D. Elevated jugular venous pressure
Answer: C
Explanation: While all choices can indicate cardiac dysfunction, bibasilar crackles are a direct
auscultatory sign of fluid transudation into the alveoli due to increased left ventricular filling
pressures, a hallmark of acute pulmonary edema.
Section 2: Electrocardiographic Diagnosis in ACS
5. According to current diagnostic criteria, which finding on a 12-lead ECG is diagnostic for ST-
segment elevation myocardial infarction (STEMI) in a male patient aged 40 years or older?
A. ST-segment depression of 1 mm in leads V5 and V6
B. New ST-segment elevation ≥ 0.2 mV (2 mm) at the J-point in contiguous leads V2 and V3
C. T-wave inversion ≥ 3 mm in leads II, III, and aVF
D. New left bundle branch block
, Answer: B
Explanation: For men ≥40, the threshold for significant ST-elevation in leads V2-V3 is 2 mm
(0.2 mV). This is a key sex and lead-specific criterion for diagnosing STEMI and activating the
catheterization lab for emergent reperfusion.
6. Which constellation of ECG findings is most indicative of a high-risk Non-ST-Segment
Elevation ACS (NSTE-ACS)?
A. Sinus tachycardia with occasional PVCs
B. Transient, dynamic ST-segment depression ≥ 0.5 mm and/or deep T-wave inversion in two or
more contiguous leads
C. Stable, long-standing Q-waves in anterior leads
D. First-degree atrioventricular block
Answer: B
Explanation: Dynamic, widespread ST-segment changes (depression or transient elevation) and
deep T-wave inversion reflect significant ongoing ischemia and are markers of high-risk NSTE-
ACS, guiding aggressive medical and invasive management.
7. A patient presents with chest pain. Their ECG shows T-wave inversion of 1.5 mm in leads V4
and V5, with no ST-segment elevation. This presentation would be classified as:
A. ST-segment elevation myocardial infarction (STEMI)
B. Stable angina pectoris
C. Low- or intermediate-risk Non-ST-Elevation ACS (NSTE-ACS)
D. Pericarditis
Answer: C
Explanation: Isolated T-wave inversion, especially of a lesser magnitude and without dynamic
symptoms, is often associated with lower-risk presentations. However, it still places the patient
in an NSTE-ACS category, requiring serial troponins and risk stratification.
