colour flow mapping is the most sensitive technique for detection
severity is assessed by measuring the proximal width or area of the jet, compared with the width area of the left ventricular outflow tract (the length of the jet is a poor estimate of severity of regurgitation)
with severe aortic regurgitation the left ventricle becomes 'volume-overloaded' and there is early closure of the mitral valve because of high end-diastolic pressure
there may be dilatation of the aorta
the anterior leaflet of the mitral valve may be seen to flutter in the regurgitant jet of blood
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