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How is an echocardiogram used to diagnose heart failure?

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Echocardiogram, an ultrasound test, evaluates heart muscle function to see how well the heart is pumping, and to detect problems with the heart valves that may cause heart failure. Ejection fraction (EF) also can be measured. EF is a measure of how much blood is pumped out of the heart with each beat, and how much blood pumps through the heart with each beat. A normal EF is generally greater than 50%, which means that over half of the blood volume in the heart's main pumping chamber is pumped out with each beat.

SOURCES: 

Silver, W., “Success With Heart Failure: Help and Hope for Those with Congestive Heart Failure,” HarperCollins, 3rd edition October 16, 2002. 

American Heart Association.

Reviewed by Suzanne R. Steinbaum on October 29, 2017

SOURCES: 

Silver, W., “Success With Heart Failure: Help and Hope for Those with Congestive Heart Failure,” HarperCollins, 3rd edition October 16, 2002. 

American Heart Association.

Reviewed by Suzanne R. Steinbaum on October 29, 2017

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How is a radionuclide ventriculography used to diagnose heart failure?

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