Klinicheskaia meditsina
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Diastolic mitral block was revealed by ++Doppler echocardiography in patients with atrioventricular block degree I, II and III in atrial flutter. The leading mechanism in pathogenesis of diastolic mitral regurgitation lies in delayed contraction of the left ventricle in relation to the left atrium causing incomplete closure of mitral cusps. ⋯ All the patients with atrioventricular block and diastolic mitral regurgitation showed tricuspid diastolic regurgitation. Diastolic mitral regurgitation induces volumetric overloading of the left atrium.