title: His-bundle electrogram in the convalescent stage of inferior myocardial infarction complicated with complete A-V block.
abstract: Twelve patients with inferior wall myocardial infarction complicated with complete atrioventricular block during the acute stage were studied. The His-bundle electrogram was studied in the convalescent stage at an average of 6 months after the acute attack. The age of the patients was 62 +/- 16 years. The width of the QRS complex was within the normal range and the PR interval was less than 200 msec. AH time was 74 +/- 18 msec (mean +/- SD). No split H activity was observed. HV time however, was significantly prolonged in the 12 patients; 54 +/- 12 msec vs. 42 +/- 9 msec in the control group (p less than 0.02). Five patients had HV time equal to or more than 60 msec. Intra-His block was suggested to exist in a high frequency in the patients who had previous complete AV block during the acute stage of myocardial infarction of the inferior wall.
mesh_terms: D001794:Blood Pressure; D002036:Bundle of His / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial; D003289:Convalescence; D004562:Electrocardiography; D006327:Heart Block / Q000150:complications* / Q000503:physiopathology / Q000628:therapy; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D009203:Myocardial Infarction / Q000150:complications* / Q000503:physiopathology