[Blood flow in the left pulmonary veins and the regional nonuniformity of the left ventricular myocardium: an ultrasonic Doppler study]. / Potok krovi v legochnykh venakh i regionarnaia neodnorodnost' miokarda levogo zheludochka: ul'trazvukovoe dopplerovskoe issledovanie.

The paper elucidates the nature of systolic peak cleavage in pulmonary venous blood flow into the major (J) and auxiliary (J') ones. A hypothesis has been forwarded, according to which the occurrence of the peak J' is associated with the kinetics of left ventricular walls and mitral ring due to regional left ventricular myocardial heterogeneity. The paper also provides indirect evidence for this hypothesis, which has been obtained by Doppler ultrasonic study of 13 healthy individuals and 34 patients with various cardiovascular diseases. It has been found that in most cases the cleavage of the peak J was observed in patients with pronounced regional left ventricular myocardial heterogeneity (postinfarct aneurysm, dilated cardiomyopathy, Wolff-Parkinson-White syndrome, etc.).