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Five-year survival after coronary bypass surgery
Scandinavian Journal of Thoracic and Cardiovascular Surgery
|January 1, 1981
Summary
This study assessed coronary bypass surgery outcomes for 128 patients from 1970-1974. Key findings show a 5-year survival rate of 87%, with internal mammary artery grafts linked to lower operative mortality.
Area of Science:
- Cardiovascular Surgery
- Medical Outcomes Research
Background:
- Coronary bypass surgery is a critical intervention for severe coronary artery disease.
- Assessing long-term survival and mortality is crucial for evaluating surgical effectiveness.
Purpose of the Study:
- To evaluate the survival and mortality rates of patients undergoing coronary bypass surgery.
- To identify factors influencing outcomes, including graft type and patient comorbidities.
Main Methods:
- Retrospective analysis of 128 consecutive coronary bypass surgery patients (1970-1974).
- Minimum 60-month follow-up for all survivors.
- Actuarial method used for five-year survival rate calculation.
Main Results:
- Operative mortality was 5.5%, decreasing to 1.6% by 1974.
- Internal mammary artery (IMA) grafts were associated with significantly lower operative mortality.
- Five-year survival rate was 87%; 5% required repeat procedures within five years.
- Congestive heart failure and triple vessel disease were more common in patients who died within five years.
Conclusions:
- Coronary bypass surgery demonstrated favorable long-term survival rates during the study period.
- IMA grafts appear to improve early surgical outcomes.
- Patient factors like congestive heart failure and disease severity impact long-term survival.