[Hemodynamics in atrioventricular block in acute myocardial infarct and its changes under the influence of electric stimulation of the heart].
Hemodynamics was studied in the initial condition and against the background of electric stimulation of the heart in 18 patients with acute myocardial infarction complicated by complete atrioventricular block. It is shown that block promotes the development of circulatory insufficiency in patients with myocardial infarction. The marked character of hemodynamic disorders and the changes induced in it by electric stimulation are determined in many respects by the functional condition of the left ventricle. In most patients with acute myocardial infarction complicated by complete atrioventricular block, with the exception of those with a clinical picture of cardiogenic shock, the main values of hemodynamics demonstrated against the background of electric stimulation hardly differ from the corresponding values in patients with myocardial infarction and no disturbances of atrioventricular conduction. During electric stimulation of the heart in the contingent of patients examined, the external work of the heart and the "tension/time" index considerably increase which suggests a marked increase in the myocardium requirements in oxygen. The probability of unbalanced increase in the requirements of the myocardium in oxygen against the background of electric stimulation dictates the necessity for raising its parameters to optimum levels.
D000208:Acute Disease; D004554:Electric Countershock; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology* / Q000628:therapy; D006334:Heart Function Tests; D006439:Hemodynamics; D006801:Humans; D009203:Myocardial Infarction / Q000150:complications / Q000503:physiopathology* / Q000628:therapy
Gemodinamika pri predserdno-zheludochkovoĭ blokade u bol'nykh ostrym infarktom miokarda i ee izmeneniia pod vliianiem élektricheskoĭ stimuliatsii serdtsa.