[Sphygmo-acoustic concordance. A valuable sign in cardiovascular examinations].

It is described an oscilloscopic-auscultatory sign named sphygmoaccoustic concordance (S-AC) which means that the changes of intensity of a cardiac or arterial murmur is concordant with the changes in the development of a pulse observed in a mechanical oscilloscope in an artery located near the site of murmur's origin. Sphygmo-accoustic discordance (S-AD) means incongruency of these phenomena. The cardiac murmurs was auscultated at the same time that the oscillation of the carotid artery was observed in a mechanical oscillometer, modify by the author, and the arterial murmur was examined during the performance of a traditional oscillomethry in a corporal segment near the site of murmur's production. 20 regurgitation murmurs (18 of mitral insufficiency, 9 of tricuspid insufficiency and 2 murmurs of interventricular septal defects) exhibit S-AD. 75% of ejective aortic murmurs had S-AC and the rest slight chronologic S-AD. 6 pulmonary ejective murmurs were discordant with the carotid pulse oscillation. 40 stenotic arterial murmurs had S-AC in relation to the proximal pulse. In 26 murmurs produced in a more than 50% lumen arterial stenosis a distal pulse was visualized an all had S-AD. The some finding was seen in 12 murmurs of arterial collateral circulation. In 34 functional arterial murmurs (flow murmurs without stenosis) there were S-AC in either, the proximal or distal pulse. The S-AC phenomenon is easy to perform and is a valuable bedside sign which is an aid in the recognition of some cardio-vascular murmurs.