[Possibilities of intracardiac phonocardiography in congenital defects with left-right shunt]

The author shares his experience from intracardial phonocardiography of 48 patients with congenital heart defects with leftright shunt. The importance of the method is stressed upon, particularly in cases with interauricular and interventricular defect, not only for the diagnosis of the disease but for the differential diagnosis in difficult cases as well. The characteristic murmurs are presented, recorded intracardially in the three of the basic congenital heart defect with left-right shunt--interauricular defect, interventricular defect, and open Botal's duct.