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Difficulty: MediumCardiovascular System

Match each patient's clinical presentation with its corresponding primary structural or hemodynamic finding.

  • A 34-year-old woman with exertional dyspnea, an opening snap, and a low-pitched apical diastolic murmur.Elevated transmitral pressure gradient and left atrial dilation
  • A 72-year-old man with exertional syncope, pulsus parvus et tardus, and a harsh systolic ejection murmur radiating to the carotids.Fixed obstruction to left ventricular outflow and increased left ventricular afterload
  • A 28-year-old man with episodes of syncope, a harsh systolic murmur that increases with the Valsalva maneuver, and bifid carotid pulses.Dynamic left ventricular outflow tract obstruction and diastolic dysfunction
  • A 40-year-old man with a history of injection drug use, fever, and a holosystolic murmur at the left lower sternal border that augments with inspiration.Right ventricular volume overload and systolic regurgitation of blood into the right atrium

Answer

The presentations match as follows: Mitral stenosis with elevated transmitral gradient; Aortic stenosis with fixed LV outflow obstruction; HCM with dynamic LV outflow obstruction; and Tricuspid regurgitation with RV volume overload.
Each clinical vignette highlights classic physical exam findings that indicate a specific structural cardiac defect. Recognizing these defects (mitral stenosis, aortic stenosis, hypertrophic cardiomyopathy, and tricuspid regurgitation) allows for direct correlation with the underlying pathophysiologic and hemodynamic disturbances.

Step-by-Step Solution

1
Identify the valvular or structural pathology in the first presentation.
The first patient has mitral stenosis.
An opening snap followed by a low-pitched diastolic murmur at the apex is the classic physical exam finding for mitral stenosis.
2
Identify the valvular or structural pathology in the second presentation.
The second patient has aortic stenosis.
Exertional syncope, a harsh systolic murmur radiating to the carotids, and pulsus parvus et tardus are hallmark signs of severe aortic stenosis.
3
Identify the valvular or structural pathology in the third presentation.
The third patient has hypertrophic cardiomyopathy (HCM).
Syncope in a young patient accompanied by a systolic murmur that intensifies with the Valsalva maneuver (which decreases preload) indicates dynamic left ventricular outflow obstruction typical of HCM.
4
Identify the valvular or structural pathology in the fourth presentation.
The fourth patient has tricuspid regurgitation.
Injection drug use strongly predisposes to right-sided endocarditis. A holosystolic murmur at the left lower sternal border that increases with inspiration signifies tricuspid regurgitation.
5
Correlate each identified pathology with its primary hemodynamic consequence.
The pairs are logically connected based on pathophysiology.
Matching the clinical diagnosis to the underlying mechanism of disease verifies the correct pairs.

Key Concept

Correlation of physical exam findings (heart murmurs and peripheral pulse variations) with underlying structural cardiac pathologies and their specific hemodynamic alterations.
Estimated Time:1m 30s
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Topics

Cardiovascular System

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