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Reduced efficacy of coronary bypass surgery in women
Insights
Men experience better long-term symptom relief after coronary bypass surgery compared to women. This may be due to higher quality revascularization achieved in men, despite similar survival rates.
Area of Science:
- Cardiology
- Surgical Outcomes
Background:
- Coronary bypass surgery is a common intervention for coronary artery disease.
- Long-term efficacy and patient-reported outcomes require further investigation, particularly regarding sex differences.
Purpose of the Study:
- To compare the long-term efficacy of coronary bypass surgery between men and women.
- To identify factors influencing symptomatic status and survival post-surgery.
Main Methods:
- Retrospective analysis of 3155 patients undergoing coronary bypass surgery over 78 months.
- Comparison of clinical profiles, operative risk, and long-term outcomes between sexes.
- Matched-pair analysis (412 pairs) to control for baseline characteristics.
Main Results:
- No significant difference in operative mortality between matched men and women.
- Women exhibited smaller coronary arteries, higher rates of diabetes and hypertension, and poorer graft patency.
- Men reported significantly better long-term symptomatic relief (70% vs. 52%) and higher activity levels.
Conclusions:
- Men achieve superior symptomatic relief following coronary bypass surgery compared to women.
- Differences in revascularization quality may contribute to the observed outcome disparities.
- Further research into sex-specific surgical techniques and outcomes is warranted.
Abstract:
To estimate long-term efficacy of coronary bypass surgery, we examined our experience with 3155 patients observed over a 78-month period. Preoperative clinical profile, operative risk, and long-term symptomatic status and survival were compared in 2663 men and 492 women. To minimize influence of unequal baseline characteristics, surgical results were also compared in 412 pairs of men and women matched by computer for age, preoperative angina classification and number of diseased vessels. Operative mortality was not significantly different in matched patients. Women had smaller distal coronary arteries, more diabetes and hypertension, a higher rate of incomplete revascularization, and reduced graft patency compared with men. Cumulative survival for men and women was 92% at 42 months. At late follow-up, significantly more men were asymptomatic (70% vs 52%, p less than 0.001) and men achieved higher activity levels. We conclude that men have more symptomatic relief after coronary bypass surgery than women. A better-quality revascularization in men may be part of the reason for this outcome.