Mitral Regurgitation – Severe


Mitral regurgitation (MR) is incompetency of the mitral valve causing flow from the left ventricle (LV) into the left atrium during ventricular systole. MR can be primary (common causes are mitral valve prolapse and rheumatic fever) or secondary to LV dilation or infarction. Complications include progressive heart failure, arrhythmias, and endocarditis. Symptoms and signs include palpitations, dyspnea, and a holo systolic apical murmur.

Now you can listen to an example of severe mitral regurgitation which is caused by degeneration of the mitral valve leaflets. Try to discern - the first heart sound is normal. But the second heart sound is widely split. Following the second heart sound there is a third heart sound gallop.

There is a loud, rectangular, pansystolic murmur. There is a brief, rumbling, diamond-shaped diastolic murmur immediately following the third heart sound. We have this auscultative picture, because the turbulent blood flows from the left ventricle following into the left atrium. This is the systolic murmur. 

You can hear the brief turbulent blood flows from the left atrium to the left ventricle in diastole. This is caused by too much blood in the left atrium which forces blood back into the ventricle during diastole producing the flow rumble. 
Mitral Regurgitation – Severe

Maneuver: Supine
Position: Mitral
Chestpiece: Diaphragm


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