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Triple-vessel coronary artery disease: Effect of revascularization on late survival
Insights
Coronary artery bypass grafting significantly improves survival for patients with triple-vessel disease and good ventricular function. This surgery reduces late mortality, primarily from heart failure and myocardial infarction.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery Outcomes
- Coronary Artery Disease
Background:
- Triple-vessel disease is a severe form of coronary artery disease.
- Aortocoronary bypass grafts are a common surgical intervention.
- Patient outcomes depend on factors like ventricular function.
Purpose of the Study:
- To evaluate the survival benefit of aortocoronary bypass grafts in patients with triple-vessel disease.
- To assess the impact of ventricular function on surgical outcomes.
- To identify causes of mortality after bypass surgery.
Main Methods:
- Retrospective analysis of the first 600 patients undergoing aortocoronary bypass.
- Stratification of patients based on ventricular function (Class I-IV).
- Analysis of in-hospital and late mortality, including causes of death.
Main Results:
- 36% of patients with triple-vessel disease died (20% in-hospital, 16% late).
- Patients with good ventricular function (Class I/II) had a 3.5% mortality rate over 27 months.
- Survival in patients with good ventricular function improved by an estimated 23.5% compared to non-surgical outcomes.
Conclusions:
- Aortocoronary bypass grafting significantly improves survival in patients with triple-vessel disease and good ventricular function.
- Congestive heart failure is the leading cause of late death post-surgery.
- Adequate coronary artery bypass (≥3 grafts) enhances survival in this patient group.
Abstract:
Of the first 600 patients to receive aortocoronary bypass grafts 383 had three diseased vessels, and of them 36 (9%) have died: 20 (5%) in hospital and 16 (4%) late. In 10 of those who died, ventricular function was normal, class I or class II and in the other 26 function was class III or class IV. For all ventricular classes except class IV, improvement in myocardial blood flow with operation was considerably lower than average in those who died. The leading cause of late death was congestive heart failure followed by myocardial infarction, and then by other cardiac complications. Of patients with good (normal, classes I or II) ventricular function, 3.5% died during a mean follow-up period of 27 months; and since, according to published reports, 1% of patients with triple-vessel disease without surgical intervention die each month, the data from this study suggest that survival in this group is improved by 23.5%. This study also shows that in patients with triple-vessel disease and good ventricular function, adequate coronary artery bypass operations (i.e., placement of three grafts or more) improves survival.