Is left ventricular function typically preserved during mitral stenosis?

Is left ventricular function typically preserved during mitral stenosis?

• A. Sometimes
• B. Yes
• C. No
• D. Unknown

Answer: (B)

Mitral stenosis mainly alters diastolic flow into the left ventricle rather than the ventricle’s ability to pump. The obstruction raises left atrial and pulmonary pressures and reduces LV filling (preload), but the left ventricle’s intrinsic systolic contractile function is usually preserved. So, even with severe stenosis, the ejection fraction and overall LV systolic performance remain typicaly normal, though forward cardiac output can fall because of limited filling. Exceptions occur if there’s coexisting heart disease or long-standing tachyarrhythmias, but in isolation the left ventricular function is preserved.

Mitral stenosis mainly alters diastolic flow into the left ventricle rather than the ventricle’s ability to pump. The obstruction raises left atrial and pulmonary pressures and reduces LV filling (preload), but the left ventricle’s intrinsic systolic contractile function is usually preserved. So, even with severe stenosis, the ejection fraction and overall LV systolic performance remain typicaly normal, though forward cardiac output can fall because of limited filling. Exceptions occur if there’s coexisting heart disease or long-standing tachyarrhythmias, but in isolation the left ventricular function is preserved.