What ejection fraction is typical in cardiomyopathy with increased left ventricular dimension?

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Multiple Choice

What ejection fraction is typical in cardiomyopathy with increased left ventricular dimension?

Explanation:
A dilated left ventricle from cardiomyopathy usually means the heart’s pumping strength is reduced, i.e., systolic dysfunction. Ejection fraction, the fraction of blood ejected with each beat, normally sits around 55-70%. When the LV enlarges and contractile function declines, the EF typically falls well below normal, most commonly under 40%. That’s why the best answer is a value less than 40%. Values above 60% reflect preserved or even hyperdynamic function, which isn’t typical for a dilated, failing ventricle. An EF in the 50s or 60s doesn’t fit the pattern of dilated cardiomyopathy with increased LV dimension.

A dilated left ventricle from cardiomyopathy usually means the heart’s pumping strength is reduced, i.e., systolic dysfunction. Ejection fraction, the fraction of blood ejected with each beat, normally sits around 55-70%. When the LV enlarges and contractile function declines, the EF typically falls well below normal, most commonly under 40%. That’s why the best answer is a value less than 40%. Values above 60% reflect preserved or even hyperdynamic function, which isn’t typical for a dilated, failing ventricle. An EF in the 50s or 60s doesn’t fit the pattern of dilated cardiomyopathy with increased LV dimension.

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