[Postextrasystolic potential in patients with a left ventricular postinfarct aneurysm].

The author analyzes the effect of postextrasystolic potentiation of contraction of the asynergic regions of the myocardium in 18 of 34 patients with postinfarction aneurysm of the left ventricle evaluated by contrast ventriculography. There was a statistically valid increase of the extension of the zones of hypokinesia due to reduction of the relative length of akinetic regions as compared with data of control contractions, a significant rise of reduction of the sizes of hypokinetic zones, increase of the fraction of ejection of the contractile segment in the general fraction of ejection. It is recommended to use the effect of postextrasystolic potentiation of contraction on the function of asynergic regions of the myocardium with the purpose of assessment of their vitality, determination of resection borders and expediency of their revascularization in the course of aneurysmectomy.