Related Experiment Videos
Atrial fibrillation and flutter after coronary artery bypass surgery: epidemiology, risk factors and preventive
L Frost1, H Mølgaard, E H Christiansen
1Department of Cardiology, Skejby Hospital, University Hospital Aarhus, Denmark.
Insights
Postoperative atrial fibrillation or flutter occurs in 20-30% of patients after coronary artery bypass grafting, peaking on postoperative days two or three. While age is a predictor, current methods lack accuracy for effective prevention.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- Atrial fibrillation (AF) and atrial flutter are frequent arrhythmias following coronary artery bypass grafting (CABG).
- These arrhythmias, while not typically life-threatening, pose significant clinical challenges, often necessitating rhythm conversion.
- Potential complications include hypotension, heart failure, pneumonia, and stroke.
Purpose of the Study:
- To review the existing literature on the epidemiology, electrophysiology, risk factors, and preventive strategies for postoperative atrial fibrillation/flutter after CABG.
- To identify key predictors and evaluate the effectiveness of current prophylactic measures.
Main Methods:
- Comprehensive literature review of studies on atrial fibrillation and flutter post-coronary artery bypass grafting.
- Analysis of epidemiological data, electrophysiological findings, and risk factor identification.
- Evaluation of results from preventive trials.
Main Results:
- Incidence of postoperative atrial fibrillation/flutter post-CABG ranges from 20-30%, with peak occurrence on postoperative days 2-3.
- Patient age is the strongest independent preoperative predictor, though its predictive accuracy is low.
- Intra-atrial conduction delay and intraoperative inducibility of AF via right atrial pacing may indicate increased risk.
Conclusions:
- Postoperative atrial fibrillation/flutter after CABG is common, with age being a significant but imperfect predictor.
- Current methods for predicting and preventing these arrhythmias post-CABG are insufficient.
- No definitively effective prophylactic regimen has been established.
Abstract:
Atrial fibrillation and atrial flutter are common arrhythmias after coronary artery bypass grafting. Although the consequences of the arrhythmia are generally not life-threatening, it constitutes a major clinical problem often requiring conversion to sinus rhythm. Atrial fibrillation or flutter can result in hypotension, heart failure, pneumonia, and stroke. This article reviews the literature on epidemiology, electrophysiology, risk factors, and preventive trials. The major conclusions are: (1) In patients undergoing coronary artery bypass surgery, the incidence of postoperative atrial fibrillation or flutter is 20-30%, the peak incidence being on the second or third postoperative day. (2) The strongest independent preoperative predictor for atrial fibrillation or flutter is the patients' age. (3) Intra-atrial conduction delay recorded pre and peroperatively may predict development of atrial fibrillation. (4) Peroperative inducibility of atrial fibrillation by pacing the right atrium may identify patients at risk for postoperative atrial fibrillation. (5) Development of postoperative atrial fibrillation or flutter has not been associated with peroperative or postoperative events. (6) The specificity and sensitivity of age and other possible relevant factors for prediction of atrial fibrillation or flutter after coronary artery bypass grafting is low. (7) No effective prophylactic regimen has yet been established.