LEFT VENTRICULTURAL FUNCTION ON ECHOCARDIOGRAPHY AND PERFUSION SCINTIGRAPHY OF MYOCARDIUM

They performed the comparative analysis of evaluation results concerning regional and integral left ventricular myocardial contractility according to echocardiography and myocardial perfusion scintigraphy (without load) among the patients with painless myocardial ischemia, regardless of the experienced myocardial infarction. The following parameters were determined: the volumes and integral contractility of the left ventricle by the disc method, the regional contractility in scores according to the scheme of seventeen segments, a number of indices of central hemodynamics. In terms of regional contractility scores, they calculated left ventricular contractility index, which can be considered as an indirect characteristic of its integral contractility.

Both methods demonstrated a high value coincidence degree of the left ventricle main functional parameters. At the same time, the assessment of regional contractility had a number of discrepancies: the index of contractility by scintigraphy was higher than the same index for echocardiography. The evaluation of regional contractility differed almost for half of the segments by the results of two methods. In most cases, the discrepancies in the assessment of regional contractility were determined by a higher degree of dysfunction according to scintigraphy results.

It can be assumed that the differences identified are related to the methodology of diagnostic studies and to the features of heart disease. The final judgment on such a complex functional indicator as regional contractility should be taken considering the results of all available methods.

Key words: ejection fraction, regional contractility, echocardiography, perfusion scintigraphy.