[An echocardiographic problem: the interventricular septum thickness in hypertrophic obstructive cardiomyopathy (author's transl)].

Peripheral venous contrast echocardiography is an established method in the assessment of cyanotic congenital heart diseases and for the exact definition of the inner cardiac surfaces outlines. We found it extremely useful in order to correctly delineate the right border of the interventricular septum in IHSS. The method showed that the interventricular system thickness had been underestimated in five out of six patients.