title: [Diagnostic importance of a study of the rate of change in potential difference during the period of ventricular repolarization in ischemic heart disease].
abstract: In patients with the acute stage of myocardial infarction the ratio between the maximum rates in the different and afferent parts of the vectocardiographic ST--T loop decreases sharply and, accordingly, the ratio between the amplitudes of the second phase of the T wave and the first phase on the first ECG diminishes. The time needed for attaining the maximum value of acceleration in the initial phase of rapid repolarization is simultaneously reduced. With the gradual recovery of the patients, these indices tend to return to normal. During the bicycle ergometric test in patients with chronic ischemic disease of the heart the reduction of these indices is revealed more frequently and at lesser loads than the shifts which are characteristic of the ordinary ECG recorded in coronary insufficiency.
mesh_terms: D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D003327:Coronary Disease / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology; D014672:Vectorcardiography
vernacular_title: Diagnosticheskoe znachenie issledovaniia skorosti izmeneniia raznosti potentsialov v period repoliarizatsii zheludochkov u bol'nykh ishemicheskoĭ bolezn'iu serdtsa.