The Mechanism of the Production of Duroziez's Murmur

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Abstract
ACCORDING to the description of Duroziez, as presented by Major1 and by Willius and Keys,2 the intermittent to-and-fro crural murmur associated with aortic insufficiency is produced by blood flow into the lower extremity during systole and back from the extremity toward the aorta during diastole. Although this may seem elementary there has been a considerable amount of investigation attempting to prove or disprove this hypothesis, and varying explanations have been suggested. Thus, Blumgart and Ernstene3 concluded, in 1933, that the diastolic portion of Duroziez's murmur arose either from backflow in the femoral artery during diastole, as seen in severe aortic . . .