Simple Cardiology MCQs for Third-Year Medical Students
Based on standardized cardiovascular training frameworks 1, here are clinically-oriented multiple-choice questions appropriate for third-year medical students:
Question 1: Heart Failure Classification
A 68-year-old man with a history of heart failure reports that he is comfortable at rest but experiences fatigue and dyspnea when walking two blocks or climbing one flight of stairs at a normal pace. What is his NYHA functional class?
A. Class I
B. Class II
C. Class III
D. Class IV
Answer: B. Class II 1
Explanation: NYHA Class II patients have slight limitation of ordinary physical activity and are comfortable at rest, but ordinary physical activity results in fatigue, palpitation, or dyspnea 1. This patient's symptoms with moderate exertion (walking two blocks, climbing one flight) fit this classification perfectly.
Question 2: Angina Classification
A 55-year-old woman reports chest discomfort only when climbing stairs rapidly or walking uphill. She has no symptoms with normal daily activities like walking on level ground. What is her Canadian Cardiovascular Angina Class?
A. Class 0
B. Class 1
C. Class 2
D. Class 3
Answer: B. Class 1 1
Explanation: Canadian Cardiovascular Angina Class 1 is defined as angina occurring with strenuous or rapid or prolonged exertion, while ordinary physical activity does not cause angina 1. This patient experiences symptoms only with strenuous activity (rapid stair climbing, uphill walking), not with ordinary activities.
Question 3: Cardiac Risk Stratification
A 62-year-old man with diabetes mellitus and no prior cardiac history presents for preoperative evaluation. According to Framingham risk criteria, what is his estimated 10-year cardiac event risk category?
A. Low risk (<10%)
B. Intermediate risk (10-20%)
C. High risk (>20%)
D. Cannot be determined
Answer: C. High risk (>20%) 1
Explanation: Diabetes is considered a coronary risk equivalent as defined by ATP III/NCEP guidelines 1. Patients with diabetes automatically qualify as high risk (>20% 10-year risk) regardless of other risk factors, placing them in the same category as those with established coronary artery disease.
Question 4: Arrhythmia Recognition
Which of the following arrhythmias is characterized by an irregularly irregular rhythm with absent P waves on ECG?
A. Atrial flutter
B. Atrial fibrillation
C. Multifocal atrial tachycardia
D. Sinus tachycardia
Answer: B. Atrial fibrillation 1
Explanation: Atrial fibrillation is the classic arrhythmia presenting with an irregularly irregular rhythm and absence of distinct P waves 1. This distinguishes it from atrial flutter (regular sawtooth pattern), multifocal atrial tachycardia (irregular but with visible P waves of varying morphology), and sinus tachycardia (regular with normal P waves).
Question 5: Cerebrovascular Disease Definition
A 70-year-old woman experienced sudden left arm weakness that completely resolved within 18 hours. What is the most accurate classification of this event?
A. Cerebrovascular accident (CVA)
B. Transient ischemic attack (TIA)
C. Metabolic encephalopathy
D. Peripheral neuropathy
Answer: B. Transient ischemic attack (TIA) 1
Explanation: A TIA is defined as abrupt onset loss of neurological function with complete return of function within 24 hours, presumed to be due to vascular etiology 1. Since this patient's symptoms resolved within 18 hours, this meets TIA criteria. A CVA would require residual symptoms lasting at least 24 hours after onset 1.
Question 6: Chest Pain Characterization
Which combination of chest pain characteristics is most consistent with typical angina?
A. Sharp, pleuritic pain worse with deep breathing
B. Substernal discomfort provoked by exertion and relieved by rest
C. Burning epigastric pain after meals
D. Stabbing pain lasting seconds
Answer: B. Substernal discomfort provoked by exertion and relieved by rest 1
Explanation: Typical angina is characterized by three key features: substernal chest pain or discomfort, provoked by exertion or emotional distress, and relieved by rest and/or nitroglycerin 1. The presence of all three characteristics defines stable angina, while having only one or two features suggests atypical chest pain.
Question 7: Device Therapy Indication
A 58-year-old man with ischemic cardiomyopathy has an LVEF of 30%, is on optimal medical therapy, and has NYHA Class II symptoms. Which device therapy is indicated for primary prevention?
A. Pacemaker only
B. Implantable cardioverter-defibrillator (ICD)
C. Cardiac resynchronization therapy (CRT) only
D. No device indicated
Answer: B. Implantable cardioverter-defibrillator (ICD) 2
Explanation: Primary prevention ICD is indicated for patients with LVEF ≤35% and NYHA Class II symptoms on guideline-directed medical therapy 2. This patient meets both criteria. CRT would require additional criteria such as left bundle branch block with QRS ≥150 ms and NYHA Class II-IV symptoms 2.
Question 8: Hypertension Management in Comorbidities
A 65-year-old man with chronic kidney disease and albuminuria requires antihypertensive therapy. Which medication class should be favored?
A. Thiazide diuretic
B. ACE inhibitor or ARB
C. Beta-blocker
D. Calcium channel blocker
Answer: B. ACE inhibitor or ARB 3
Explanation: For patients with chronic kidney disease and albuminuria, ACE inhibitors or ARBs are the favored first-line agents 3. These medications provide renoprotective effects beyond blood pressure control. An ARB should be used if an ACE inhibitor is not tolerated 3.
These questions align with ACC/AHA standardized training frameworks 1 and cover essential cardiology concepts appropriate for third-year medical students, including heart failure classification, angina assessment, risk stratification, arrhythmia recognition, and guideline-based management 3, 2.