title: [Duration of electric systole in the acute phase of myocardial infarct. Methodology, natural history, semiological value, therapeutic consequences].
abstract: Extension of the duration of electric systol in the acute phase of coronary thrombosis can be analysed in satisfying conditions whatever the physiological frequencies by the measurement (formula; see text) represents the average QT measurement of three non-consecutive complexes in five derivations (DI, DIII, aVF, VI and V6). This extension is of prognostic value when the QTc is greater than 44 c/s. Out of 1 255 acute phase thrombosis patients, 18 Out of 20 cases of ventricular fibrillation revealed a QTc greater than 44 c/s in the 24 hours preceding sudden death. Therapeutic intervention with anti-andrenergic drugs such as bretylium tosylate or beta-blocking agents appears to reduce the QTc of these patients and thus prevent sudden death.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D009203:Myocardial Infarction / Q000188:drug therapy / Q000503:physiopathology*; D013599:Systole; D013997:Time Factors; D014665:Vasodilator Agents / Q000627:therapeutic use
chemical_list: D014665:Vasodilator Agents
vernacular_title: Durée de la systole électrique à la phase aiguë de l'infarctus du myocarde. Méthodologie, histoire naturelle, valeur séméiologique et conséquences thérapeutiques.