Constrictive péricarditis (CCP) is a rare but serious disease. It still poses diagnostic difficulties. The purpose of our work is to study the contribution of the echocardiographic Doppler in the diagnosis of the CCP. The authors report six cases of CCP proven after surgery. Study by ultrasound Doppler of intracardiac blood flow and their respiratory variations showed the existence of abnormalities. The decrease of 25% of the mitral E wave in inspiration compared to the value observed in expiration, the increase of 100% of the ebb in sus hépatic vein in expiration and the modifications of the flux in pulmonary insufficiency are the most reliable signs for the diagnosis of the CCP. This method seems so interesting for the diagnosis and to estimate the degree of constriction of the CCP.