[Echocardiographic study with the Doppler effect, of floating of the interventricular septum as a determining factor in the genesis of innocent murmurs].

The present study offers the possibility of individuating the genesis of innocent murmurs. 30 patients between 5 and 20 years, showing at the phonocardiogram a train of oscillations in a proto-mesosistolic or mesosistolic phase with characteristics that testify an innocent murmur, have been examined. The routine examinations and cardiac cateterism to exclude congenital or acquired heart diseases have been done to all the patients. The echocardiographic examination has shown a characteristic floating of the interventricular septum, that, producing a variable mutability of the dimensions of the right ventricular cavities, determines, particularly in the tract of the right ventriculae efflux, a hematic turbolent flow well visible with the Doppler effect. The genesis of the innocent murmurs must be referred to such a turbolence, secondary to the floating of the septum, and this accords with Feruglio, who asserts he has always found, with the endocavitary phonocardiography, innocent murmurs only in the infundibulum of the pulmonary.