Effect of cardiac pacing on ECG pattern in patients with myocardial infarction.
The ECG tracings in patients with recent and past myocardial infarction and permanent or temporary artificial pacing were analysed. The observations were made in 12 patients (8 with recent infarction and 4 with a past one). Anterior wall infarction was diagnosed in 4 subjects, anteroseptal in 3, inferior wall infarction was recognized in 4, and posterior wall infarction in one patient. In the stimulated complexes of persons with anterior and anteroseptal infarctions there appears a pathological Q deflection with ST segment elevation in leads I, aVL, V5. In the infarct of the inferior wall the ST segment elevation occurs in leads II, III, aVF without the presence of Q deflection. No differences were shown in the morphology of stimulated complexes in persons with recent and past myocardial infarction.
D000208:Acute Disease; D000368:Aged; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000503:physiopathology* / Q000628:therapy