Which condition describes the mitral valve falling into the left atrium during systole, preventing the valve from sealing properly?

Which condition describes the mitral valve falling into the left atrium during systole, preventing the valve from sealing properly?

• A. Aortic Stenosis
• B. Mitral Valve Prolapse
• C. Mitral Stenosis
• D. Murmurs

Answer: (B)

Mitral valve prolapse happens when the mitral valve leaflets billow backward into the left atrium as the left ventricle contracts. This back-bowing prevents the valve from sealing tightly, so some blood flows backward during systole, which is why it’s described as the valve “falling into” the atrium. The tissue of the valve is often floppy due to myxomatous degeneration, with leaflets that are thickened and chords that are elongated, making the seal unreliable during the surge of pressure in systole. Clinically, this condition can present with a midsystolic click and a variable murmur that may become louder or softer with different positions or maneuvers. Many people have no symptoms, but some may experience palpitations or lightheadedness due to the regurgitation. This fits the description best because it specifically involves the mitral valve failing to close properly during systole due to prolapse. Other options describe different valve problems: aortic stenosis is a narrowing of the aortic valve and produces a harsh systolic murmur at the right upper chest; mitral stenosis is a diastolic issue with opening snaps and rumbling sounds; murmurs is a broad term for abnormal sounds and isn’t a specific diagnosis.

Mitral valve prolapse happens when the mitral valve leaflets billow backward into the left atrium as the left ventricle contracts. This back-bowing prevents the valve from sealing tightly, so some blood flows backward during systole, which is why it’s described as the valve “falling into” the atrium. The tissue of the valve is often floppy due to myxomatous degeneration, with leaflets that are thickened and chords that are elongated, making the seal unreliable during the surge of pressure in systole.

Clinically, this condition can present with a midsystolic click and a variable murmur that may become louder or softer with different positions or maneuvers. Many people have no symptoms, but some may experience palpitations or lightheadedness due to the regurgitation.

This fits the description best because it specifically involves the mitral valve failing to close properly during systole due to prolapse. Other options describe different valve problems: aortic stenosis is a narrowing of the aortic valve and produces a harsh systolic murmur at the right upper chest; mitral stenosis is a diastolic issue with opening snaps and rumbling sounds; murmurs is a broad term for abnormal sounds and isn’t a specific diagnosis.