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Table of Contents > Health Dictionary > Regurgitant fraction

Regurgitant fraction

The amount of blood regurgitated into a cardiac chamber divided by the stroke output; normally, no blood regurgitates; in patients with severe valvular lesions such as mitral or aortic insufficiency, regurgitant fraction can approach 80%; this fraction affords a quantitative measure of the severity of the valvular lesion.
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