Early Mortality among Patients with Early Supraventircular Tachyarrhythmia after Acute Myocardial Infarction

Adel Seyed Mohammad Hasan, M Alasti, M Ashrafi


Background and Objective: Left ventricular function, coronary artery injuries, and the existence of ventricular arrhythmias are known as the main factors affecting patients’ survival after acute myocardial infarction. In this study, the frequency of early mortality (1 month) was evaluated among patients with early supraventricular tachyarrhythmia (<72 hours) during the first acute myocardial infarction (AMI).

Material and Methods: In this prospective descriptive study, we studied 315 AMI patients with the first ST-segment elevation. Various factors including age, gender, risk factors, and type of supraventricular tachyarrhythmias (within the first 72 hours of CCU admission) were collected from medical records. Patients were followed up for a month. The manifestation of cases like sudden cardiac death and (or) heart attacks led to death was extracted and statistically analyzed.

Results: Among 300 patients, 208 individuals (69.3%) had one tachyarrhythmia with 8.1% mortality, 78 patients (26%) had two tachyarrhythmia with 12.8% mortality and the rest 11(3.7%) had three tachyarrhythmia with 45% mortality in one month. Mortality among patients with and without atrial tachycardia (AT) was 36% and 9.4 %, respectively (p<0.05). Yet, in patients with and without atrial fibrillation (AF), it was 20% and 9 %, respectively (p > 0.05). Mortality among patients with and without atrial premature contraction (APCs) was 8% and 14%, respectively (p > 0.05). Though, among patients with and without sinus tachycardia (ST), it was 15% and 5%, respectively (p <0.05).

Conclusion: Early mortality (within 30 days) during acute myocardial infarction (S-T elevation) was more prevalent among patients with sinus tachycardia, atrial tachycardia, and simultaneous multiple supraventricular tachyarrhythmias.

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