RESUMEN
BACKGROUND: Post myocardial infarction arrhythmias can very commonly lead to death. Hence we studied the various arrhythmias arising within the first 24hours ofmyocardialinfarction. METHODS: Myocardial infarction was confirmed with detailed history, clinical examination, laboratory investigations, and 12 lead electrocardiogram. 50 patients who presented within 1 hour of onset ofsymptoms were included in study. Patients' cardiac rhythm was monitored for at least 72 hours in intensive coronary care unit. RESULTS:Incidence of various Tachyarrhythmias were: 1. Ventriculartachy cardia (8%), 2. Atrial Fibrillation(4%), 3. Supraventriculartachy cardia (2%). 4. Ventricularfibrillation was not observed. CONCLUSION: Arrhythmias carrying very high mortality were complete heart block, bilateral bundle branch block and right bundle branch block. Arrhythmias with anterior wall infarction carried bad prognosis while arrhythmias with inferior wall infarction had good prognosis