[Longitudinal shift of left ventricle walls in norm and in dilated cardiomyopathy]

Peculiarities of longitudinal shift of the left ventricle (LV) walls were studied in patients in various variants of dilated cardiomyopathy (DCMP). In patients, suffering DCMP, the enhancement of the end-diastolic (EDI) and the end-systolic (ESI) indexes are noted, as well as of the punch index and expulsion fraction, the pulmonary artery hypertension, moderate insufficiency of mitral and tricuspid valves. These changes are aggravated in complete blockade of left pedicle of atrio-ventricular fascicle (AVF). In cardiac contractions, in normal conditions and in DCMP as well, a maximally pronounced longitudinal myocardial shift is revealed in basal segments of LV, while cardiac apex remains practically immobile. In DCMP a longitudinal shift of the LV myocardium reduces significantly while cardiac insufficiency progression. In complete blockade of left pedicle of AVF, presented by total reduction of amplitude of longitudinal myocardial shift in the LV lateral and posterior walls, aggravation of a mitral valve insufficiency (up to 2+) and raising of pressure in pulmonary artery--up to (60.1 ± 7.5) mm Hg, further progression of the blood circulation insufficiency were noted.