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Predictors of death during 5 years after coronary artery bypass grafting
J Herlitz1, G Brandrup-Wognsen, M Haglid
1Division of Cardiology, Sahlgrenska University Hospital, Göteborg, Sweden.
Insights
Predictors of long-term death after coronary artery bypass grafting (CABG) include smoking, heart function, age, and post-operative complications. Identifying these factors aids in improving patient outcomes following CABG surgery.
Area of Science:
- Cardiology
- Cardiac Surgery
- Outcomes Research
Background:
- Coronary artery bypass grafting (CABG) is a common procedure for severe coronary artery disease.
- Understanding long-term mortality predictors after CABG is crucial for risk stratification and patient management.
Purpose of the Study:
- To identify independent predictors of death occurring more than 30 days after CABG.
- To analyze preoperative, peroperative, and early postoperative factors influencing five-year mortality.
Main Methods:
- A prospective cohort study included 2121 patients undergoing CABG without valve surgery.
- Mortality was assessed over a five-year follow-up period.
- Predictors included preoperative conditions, intraoperative factors, physical examination findings, and early postoperative data.
Main Results:
- Overall five-year mortality was 14.6%.
- Eleven independent predictors of late mortality were identified.
- Key predictors included current smoking, impaired left ventricular function, congestive heart failure history, advanced age, postoperative arrhythmia, intermittent claudication, diabetes history, prolonged respirator time, cerebrovascular disease history, digitalis use, and elevated enzyme release.
Conclusions:
- Multiple factors independently predict long-term mortality after CABG.
- These predictors encompass patient comorbidities, cardiac function, surgical factors, and early postoperative status.
- This knowledge can inform clinical decision-making and postoperative care strategies to mitigate risks.
Aim:
To describe predictors of death during five years of follow-up after coronary artery bypass grafting (CABG).
Methods:
All patients who underwent CABG during a period of three years in Western Sweden were included in the analysis and were prospectively followed for five years. Mortality was related to preoperative and peroperative factors as well as findings at physical examination and medication 4-7 days after the operation.
Results:
In all 2121 patients underwent CABG without simultaneous valve surgery during the study period. The overall five-year mortality was 14.6%. The following appeared as independent predictors of death during five years but >30 days after CABG: Current smoking (relative risk ratio 2.43 [95% Ci 1.64-3.61]) degree of impairment of left ventricular function (1.51 [1.23-1.86]), a history of congestive heart failure (1.91 [1.35-2.701), age (1.04 [1.02-1.06]) arrhythmia 4-7 days after CABG (1.89 [1.26-2.83]), intermittent claudication (1.73 [1.19-2.52]), a history of diabetes (1.71 [1.16-2.51]), time in respirator (1.43 [1.13-1.81]), a history of cerebrovascular disease (1.72 [1.13-2.64]), treatment with digitalis at day 4-7 (1.48 [1.07-2.05]), enzyme release (1.49 [1.03-2.16]).
Conclusion:
Among patients who underwent CABG 11 independent predictors for mortality were found including smoking habits at CABG, history of cardiovascular diseases, left ventricular dysfunction, age, post operative complications and medication after CABG.