Related Experiment Videos
[Survival and causes of secondary mortality in patients undergoing coronary bypass. Comparison with a same age
J P Cron1, F Baud, D Blanchard
1Clinique Saint Gatien, Tours.
Insights
Coronary bypass surgery improves long-term survival. Patients undergoing myocardial revascularization experienced lower mortality from cardiovascular disease, cancer, and other causes compared to controls.
Area of Science:
- Cardiology
- Cardiac Surgery
- Public Health
Background:
- Coronary artery disease remains a leading cause of mortality worldwide.
- Myocardial revascularization is a common surgical intervention for severe coronary artery disease.
- Long-term survival benefits and causes of mortality post-coronary bypass require ongoing investigation.
Purpose of the Study:
- To evaluate the long-term survival rates of patients who underwent coronary bypass surgery.
- To compare the mortality causes in post-coronary bypass patients versus an age-matched control population.
- To identify factors contributing to long-term survival after myocardial revascularization.
Main Methods:
- A 10-year longitudinal follow-up study of 867 patients who underwent coronary bypass by the same surgical team.
- Accurate determination of causes of death for all patients in the study cohort.
- Comparison of mortality rates and causes between the surgical group and a longitudinally studied, age-matched control population.
Main Results:
- Overall mortality in the surgical group was initially slightly higher than controls (84 vs 77), but after discounting operative mortality, survivors showed significantly better survival (47 vs 77).
- Patients with specific conditions like three-vessel disease, tight coronary artery stenosis, or reduced ejection fraction demonstrated substantial survival benefits from myocardial revascularization.
- A surprising finding was a significant reduction in long-term mortality not only from cardiovascular causes (16 vs 24) but also from cancer (15 vs 27) and other causes (16 vs 26) in the surgical group compared to controls.
Conclusions:
- Coronary bypass surgery significantly improves long-term prognosis for life, particularly for high-risk patients.
- The enhanced long-term survival post-coronary bypass is attributed to reduced cardiovascular, cancer, and other causes of death.
- Adoption of a healthier lifestyle and consistent medical follow-up appear to be crucial contributing factors to the improved long-term survival observed in these surgical patients.
Abstract:
During 10 years, 867 patients in whom the same surgical team had performed coronary bypass were followed up regularly without any of them being lost sight of. Moreover, the cause of all deaths in this group could be determined fairly accurately. A comparison of mortality between these patients and an age-matched control population studied longitudinally, year after year, showed that the mortality rate in the surgical group was slightly higher than in the control group (84 vs 77). Conversely, when the operative mortality was discounted, it appeared that the patients who survived coronary bypass had a much better survival than the control population (47 vs 77). Without any doubt, the prognosis for life is improved by surgery. In particular, patients with three-vessel disease (58 per cent), tight stenosis of the common coronary artery (10-25 per cent) or altered ventricular ejection fraction (about 30 per cent) would probably have died without myocardial revascularization. However, this study produced a rather astonishing result: compared with the control population, the decrease of long-term mortality in patients who survived coronary bypass was due not only to the decrease of cardiovascular deaths (16 vs 24) but also of deaths due to cancer (15 vs 27) or to other causes (16 vs 26). This suggests that a more hygienic life and a correct medical follow-up contribute to a large extent to the long-term survival of these surgical patients.