Valvular Heart Disease
Help Questions
USMLE Step 2 CK › Valvular Heart Disease
A 45-year-old man with prior endocarditis now has severe AR. Exam: early diastolic murmur at LSB and wide pulse pressure. Echo shows regurgitant jet and LV dilation. Which diagnostic test best confirms severity and guides timing of surgery?
Exercise spirometry to determine if symptoms are pulmonary in origin
D-dimer testing to quantify the degree of valvular incompetence
Transthoracic echocardiography with Doppler assessment of regurgitation and LV size
Abdominal ultrasound to evaluate for hepatic congestion causing dyspnea
Chest X-ray to measure valve area and calculate regurgitant fraction
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of early diastolic murmur, wide pulse pressure, and echo showing regurgitant jet and LV dilation in a patient with prior endocarditis indicate severe aortic regurgitation. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as transthoracic echocardiography with Doppler to confirm severity and guide surgery timing. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 55-year-old woman has severe MR and is otherwise healthy. Exam: holosystolic apical murmur radiating to axilla, S3. Echo: flail posterior leaflet, severe MR, LVEF 62%, LVESD 38 mm. Which management strategy is most appropriate?
Chest X-ray every month to monitor regurgitation severity progression
Long-term antibiotics to prevent recurrence of regurgitation from infection
Early referral for mitral valve repair evaluation at experienced center
Observation only until LVEF falls below 30% or shock develops
High-dose beta-blocker as definitive therapy for severe degenerative MR
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of holosystolic apical murmur, S3, and echo showing flail posterior leaflet with severe MR, preserved LVEF, and normal LVESD indicate severe primary mitral regurgitation. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as early referral for mitral valve repair at an experienced center. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 55-year-old woman has severe chronic MR on Doppler echo and progressive dyspnea. Exam: holosystolic murmur at apex radiating to axilla, S3. Echo shows LVEF 58% and LV end-systolic diameter 42 mm. Which diagnostic test should be ordered next?
Chest X-ray to quantify regurgitant volume and valve orifice area
Ventilation-perfusion scan to confirm chronic thromboembolic lung disease
Transesophageal echocardiography to better define valve anatomy for repair
Lower extremity Doppler ultrasound to evaluate for deep vein thrombosis
Noncontrast head CT to evaluate for silent embolic infarcts
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of progressive dyspnea, holosystolic murmur, S3, and echo showing severe MR with preserved LVEF and increased LVESD indicate severe chronic mitral regurgitation. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as transesophageal echocardiography to define valve anatomy for repair. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 35-year-old woman with mitral stenosis reports dyspnea on exertion. Exam: opening snap and diastolic rumble at apex. Echo: MVA 0.8 cm², mean gradient elevated, LA enlarged. Which management strategy is most appropriate?
Delay all intervention until severe right ventricular failure is present
Evaluate for percutaneous mitral balloon valvotomy if valve morphology is favorable
Treat with bronchodilators because wheeze is expected in mitral stenosis
Start nitrates as definitive therapy to open the stenotic mitral valve
Order chest CT as the next test to measure mitral valve area accurately
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of dyspnea on exertion, opening snap, diastolic rumble, and echo showing MVA 0.8 cm² with elevated gradient and enlarged LA indicate severe mitral stenosis. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as evaluating for percutaneous mitral balloon valvotomy if valve morphology is favorable. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 55-year-old woman has severe MR on Doppler echo. She develops new dyspnea and leg swelling. Exam: holosystolic apical murmur radiating to axilla, S3, elevated JVP. BNP elevated. Which is the most likely complication of this condition?
Acute aortic dissection causing tearing chest pain radiating to back
Hypertrophic cardiomyopathy with dynamic obstruction worsening with Valsalva
Primary adrenal insufficiency causing hyperpigmentation and hypotension
Cyanotic congenital shunt reversal causing clubbing and polycythemia
Left-sided heart failure with pulmonary edema from chronic volume overload
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of new dyspnea, leg swelling, holosystolic murmur, S3, elevated JVP, and elevated BNP in a patient with severe MR indicate a complication of the condition. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as identifying left-sided heart failure with pulmonary edema from chronic volume overload. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 35-year-old woman with rheumatic mitral stenosis becomes pregnant and develops worsening dyspnea. Exam: opening snap and diastolic rumble; mild ankle edema. Echo confirms severe MS. Which management is most appropriate initially?
Start diuretics and rate control to reduce pulmonary congestion and tachycardia
Treat with high-dose antibiotics because pregnancy worsens rheumatic fever activity
Give thrombolytics prophylactically to prevent left atrial thrombus formation
Begin high-intensity exercise training to improve functional capacity rapidly
Start ACE inhibitor immediately to reduce afterload during pregnancy
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of worsening dyspnea during pregnancy, opening snap, diastolic rumble, mild ankle edema, and echo confirming severe MS indicate rheumatic mitral stenosis exacerbated by pregnancy. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as starting diuretics and rate control to reduce pulmonary congestion. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 55-year-old woman has severe MR and new atrial fibrillation. Exam: holosystolic apical murmur radiating to axilla; irregularly irregular rhythm. Echo confirms severe MR with LA enlargement. Which is the most appropriate management strategy?
Begin diuretics only and delay valve evaluation until severe hypotension develops
Start thrombolysis to restore sinus rhythm immediately in stable outpatient
Anticoagulation and rate control, plus timely referral for mitral valve intervention
Stop all activity and treat with antibiotics because atrial fibrillation implies endocarditis
Order chest X-ray as definitive test to guide surgical timing in MR
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of holosystolic apical murmur, irregularly irregular rhythm, and echo confirming severe MR with LA enlargement indicate severe mitral regurgitation with new atrial fibrillation. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as anticoagulation, rate control, and referral for mitral valve intervention. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 70-year-old man has severe AS with chest pain and dyspnea. Exam: harsh systolic ejection murmur at RUSB; carotid upstroke delayed. Echo: AVA 0.6 cm². Which is the most likely diagnosis?
Acute pericarditis with friction rub and diffuse ST-segment elevation
Severe aortic stenosis causing fixed LV outflow obstruction and exertional symptoms
Hypertrophic cardiomyopathy with dynamic murmur increasing during Valsalva
Mitral valve prolapse with mid-systolic click and late systolic murmur
Tricuspid regurgitation with inspiratory augmentation at left lower sternal border
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of chest pain, dyspnea, harsh systolic ejection murmur, delayed carotid upstroke, and echo showing AVA 0.6 cm² indicate severe aortic stenosis. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as diagnosing severe aortic stenosis causing fixed LV outflow obstruction. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 35-year-old woman with rheumatic mitral stenosis has worsening dyspnea. Exam: opening snap and diastolic rumble at apex; irregularly irregular pulse. Echo shows MVA 0.9 cm² and large LA. Which is the most appropriate initial treatment?
Treat with high-dose steroids to reverse rheumatic valve scarring
Start anticoagulation and rate control for atrial fibrillation in mitral stenosis
Start dual antiplatelet therapy because rheumatic disease is atherosclerotic
Give IV fluids to increase preload and improve forward flow
Start ACE inhibitor to reduce afterload and open the stenotic valve
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of worsening dyspnea, opening snap, diastolic rumble, irregularly irregular pulse, and echo showing severe MS with large LA indicate rheumatic mitral stenosis with atrial fibrillation. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as starting anticoagulation and rate control. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.
A 35-year-old woman with mitral stenosis has exertional dyspnea. Exam: opening snap and diastolic rumble at apex. Echo shows MVA 1.1 cm². Which diagnostic test should be ordered next to assess for embolic risk?
Chest X-ray to directly visualize left atrial appendage thrombus
Serum troponin to quantify severity of mitral valve obstruction
Pulmonary function tests to diagnose restrictive lung disease as primary cause
D-dimer to rule out chronic thrombus formation in left atrium
ECG to evaluate for atrial fibrillation contributing to thromboembolism risk
Explanation
This question tests USMLE Step 2 CK skills in diagnosing and managing valvular heart disease, focusing on clinical decision-making and application of guidelines. Valvular heart disease involves defects in the heart valves leading to regurgitation or stenosis, affecting hemodynamics and requiring specific management strategies. In the vignette, the presence of exertional dyspnea, opening snap, diastolic rumble, and echo showing MVA 1.1 cm² indicate mitral stenosis. The correct answer is based on recognizing these findings and applying evidence-based management or diagnostic steps, such as ECG to evaluate for atrial fibrillation contributing to embolic risk. A common distractor might suggest a less appropriate test or treatment, such as relying on a chest X-ray when an echo is indicated. Teaching strategies include reinforcing the importance of correlating physical exam findings with potential diagnoses and understanding guideline-directed management for valvular conditions. Encourage practice through case studies and simulation of clinical scenarios.