抄録
High speed phonocardiography (Caniggia, Bertelli, Lodone) was employed to analyse objectively and in detail the vibrations of heart sounds and murmurs.
In this article the following murmurs were studied: 3 musical diastolic murmurs of aortic insufficiency; 5 musical mitral systolic murmurs of mitral insufficiency ; 1 musical mitral systolic murmur in aortic insufficiency ; 1 musical telesystolic murmur auscultated at a certain distance from the thorax.
The main characteristic of musical murmurs is the perfectly sinusoidal shape of the vibrations which compose them.
The frequency of musical aortic diastolic murmurs is about 300 c.p.s. ; the frequency of musical mitral systolic murmurs is about 150 c.p.s.
