Đặc điểm thay đổi biến thiên nhịp tim trước và sau phẫu thuật cầu nối chủ vành

The study involved 119 consecutive patients who underwent the first CABG operation with sinus rhythm. All subjects underwent assessed with 24-hour Holter recordings 2 days preoperative and 7 days, 3 months, 6 months postoperative at Hanoi Heart Hospital from 6/2016 to 8/2018.14 Main results: All indicators of heart rate variability decreased to the lowest level after surgery 7 days, recovers to the preoperative values within three to six months of the procedure. The incidence of pre and postoperative low HRV varies from 28.6% (preop) to 51.8% (postop 7 days), 19.6% (postop 3 months) and 12.7% (postop 6 months). Conclusions: This study have showed that CABG surgery generally leads to significant reduction in HRV. HRV gradually recovers to the preoperative values within three to six months of the procedure.