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Comparison of angioplasty and bypass surgery in multivessel coronary artery disease
Insights
Coronary angioplasty shows promise for multivessel coronary artery disease, but restenosis necessitates further intervention in a third of patients. A large randomized trial is needed to compare angioplasty with bypass surgery.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Clinical Trials
Background:
- The established role of coronary angioplasty in treating multivessel coronary artery disease remains unclear.
- Multivessel coronary artery disease requires effective revascularization strategies, with both angioplasty and bypass surgery being options.
Purpose of the Study:
- To compare the immediate and 1-year outcomes of coronary angioplasty versus coronary bypass surgery in patients with multivessel coronary artery disease.
- To evaluate the initial success rates, hospital stay, and long-term clinical outcomes of these two treatment modalities.
Main Methods:
- A comparative study involving 60 patients undergoing coronary angioplasty and 41 patients undergoing coronary bypass surgery for multivessel coronary artery disease.
- Data collected included immediate procedural success, hospital length of stay, and 1-year follow-up on survival, functional class, myocardial infarction, and medication use.
Main Results:
- Coronary angioplasty was initially successful in 70% of cases with no deaths and shorter initial hospital stays compared to bypass surgery.
- At 1-year follow-up, no significant differences were observed in survival, functional status, or subsequent cardiac events between the two groups.
- A notable 33% of successfully treated angioplasty patients required repeat procedures due to restenosis or incomplete revascularization.
Conclusions:
- Coronary angioplasty can be performed successfully in patients with multivessel coronary artery disease, offering a shorter initial hospital stay.
- Long-term outcomes were comparable to bypass surgery, but a significant rate of restenosis necessitates further interventions.
- Definitive comparisons are limited by small sample sizes and potential selection bias, highlighting the need for a multicenter prospective randomized trial.
Abstract:
The role of coronary angioplasty in the treatment of patient with multivessel coronary artery disease has not been fully established. We compared immediate and 1-year follow-up results in 60 patients undergoing coronary angioplasty for multivessel coronary disease in 1982 with 41 patients anatomically suitable for angioplasty but who underwent elective coronary bypass surgery during the same time period. Baseline variables were similar in both groups except for number of vessels diseased which was higher in the surgical group. Angioplasty was initially successful in 70% of cases. There were no deaths. Mean initial hospital days were lower in the angioplasty group. At follow-up there were no significant differences in survival, functional class, occurrence of subsequent myocardial infarction or use of cardiac medications. However, 33% of the successfully dilated patients required either repeat dilatation or subsequent bypass surgery because of restenosis or inadequate initial revascularization. The statistical power of the study was limited due to the small sample sizes. While demonstrating that angioplasty can be successfully performed in patients with multivessel disease, definitive conclusions about the comparability of the two treatments are hampered by possible selection bias and small patient numbers. This issue could be better addressed by a multicenter prospective randomized trial.