Dysrhythmia in acute coronary syndrome patients undergoing coronary artery bypass grafting surgery at hanoi heart hospital

Abstract

Objectives: Many studies have demonstrated arrhythmias were common in acute coronary syndrome and coronary artery bypass grafting surgery. Although the most of these arrhythmias were transient and have a benign course, but it may represent a significant source of morbidity and mortality. This study aimed to establish the temporal change pattern of arrhythmias observed to determine the incidence and characteristics of dysrhythmia.
 Methods: A prospective method was used to study 52 consecutive patients with acute coronary syndrome who were assessed using 24-hour Holter recordings before CABG and 1 week, 3 months, and 6 months after the surgery from June 2016 to August 2018 at Hanoi Heart Hospital.
 Results: New appearance of atrial fibrillation after coronary artery bypass grafting surgery increased by time, at 7 days was 17.3%, after 3 and 6 months were 10 - 18.4%. Percentage of ventricular dysrhythmias was highest before surgery 8.67%, decreased after surgery and lowest after 6 months. The rate of short ventricular tachycardia at 7 days after surgery was highest (11.8%), followed by the preoperative period (3.8%), decreased and disappeared after 6 months. Ventricular arrhythmias with Lown (grade > 3) preoperative was 44.2%, increased at 7 days postop was 51.9% and decreased postop 3 - 6 month (28 - 20%).
 Conclusion: New appearances of atrial fibrillation after coronary artery bypass grafting surgery increased by time. Dysrhythmia was acutely affected by myocardial ischemia and coronary artery bypass grafting surgery.