[The relationship between supraventricular arrhythmia after coronary artery bypass grafting and autonomic nerve system].
We evaluated the relationship between supraventricular arrhythmia after coronary artery bypass grafting (CABG) and autonomic nerve system. Holter electrocardiogram was recorded in 57 postoperative patients. The heart rate variability was analyzed in 25 premature atrial contraction (PAC) cases and 4 atrial fibrillation (AF) cases. Sixty minutes just before the onset of PAC/AF were devided into 12 equal parts, and NN 50, RMSSD, HF, LF/HF were measured respectively. NN 50, RMSSD and HF were each used as an indicator to show the parasympathetic nerve (PSN) activity, and LF/HF as an indicator to show the sympathetic nerve (SN) activity. The mean value of the former 6 parts was compared to that of the latter 6 parts. As for 25 PAC cases, PAC occurred under the dominance of PSN in 30% of the cases, under the dominance of SN in 10% of the cases and under the balanced condition of both nerves in 60% of the cases. As for 4 AF cases, AF occurred under the parasympathetic condition in 3 cases and under the sympathetic condition in 1 case. These results show that supraventricular arrhythmia after CABG is associated with PSN system.
Hayashi
Saihou
S
Department of Cardiovascular Surgery, Chugoku Rosai Hospital, Kure, Japan.
Kohata
S
S
Furukawa
T
T
D001281:Atrial Fibrillation / Q000209:etiology* / Q000503:physiopathology; D018880:Atrial Premature Complexes / Q000209:etiology* / Q000503:physiopathology; D001341:Autonomic Nervous System / Q000503:physiopathology*; D001026:Coronary Artery Bypass; D015716:Electrocardiography, Ambulatory; D006801:Humans; D010275:Parasympathetic Nervous System / Q000503:physiopathology; D011183:Postoperative Complications