A Randomized Trial Comparing Coronary Angioplasty with Coronary Bypass Surgery
Spencer B. King, Nicholas J. Lembo, William S. Weintraub, Andrzej S. Kosinski, Huiman X. Barnhart, Michael H. Kutner, Naomi P. Alazraki, Robert A. Guyton, Xue-Qiao Zhao, for The Emory Angioplasty versus Surgery Trial (EAST)
Background The clinical benefit of percutaneous transluminalcoronary angioplasty (PTCA) as compared with coronary-arterybypass grafting (CABG) for patients with multivessel coronaryartery disease has not been established. To determine the outcomesof these treatments in patients referred for the first timefor coronary revascularization, we conducted a three-year prospective,randomized trial comparing the two procedures.
Methods Revascularization was performed by accepted methods.Follow-up clinical information was collected every six months,and coronary arteriography and thallium stress scanning wereperformed at one and three years. The primary end point wasa composite of death, Q-wave myocardial infarction, and a largeischemic defect identified on thallium scanning at three years.Secondary end points included clinical and angiographic statusand the need for additional revascularization procedures. Datawere analyzed according to the intention-to-treat principle.
Results Of the 5118 patients screened for the trial, 842 (16.5percent) were eligible for enrollment, and 392 (7.7 percent)agreed to participate. A total of 194 patients were randomlyassigned to the CABG group, and 198 to the PTCA group. The primaryend point occurred in 27.3 percent of the CABG group and 28.8percent of the PTCA group (P = 0.81). Death occurred in 6.2percent of the CABG group and 7.1 percent of the PTCA group(P = 0.73 by log-rank test). At three years, the proportionsof patients in the CABG group who required repeated bypass surgery(1 percent) or angioplasty (13 percent) were significantly lowerthan the proportions in the PTCA group (22 and 41 percent, respectively;P<0.001). Angiographic studies at three years showed a greaterdegree of revascularization in the CABG group. Angina was morefrequent in the PTCA group (20 percent) than in the CABG group(12 percent).
Conclusions We found that CABG and PTCA did not differ significantlywith respect to the occurrence of the composite primary endpoint. Consequently, the selection of one procedure over theother should be guided by patients' preferences regarding thequality of life and the possible need for subsequent procedures.
Source Information
From the Divisions of Cardiology (S.B.K., N.J.L., W.S.W.), Radiology (N.P.A.), and Cardiothoracic Surgery (R.A.G.), Emory University School of Medicine, Atlanta; the Division of Biostatistics (A.S.K., H.X.B., M.H.K.), Emory University School of Public Health, Atlanta; and the Division of Cardiology, University of Washington School of Medicine, Seattle (X.-Q.Z.). Study participants are listed in the Appendix.
Address reprint requests to Dr. King at Emory University Hospital, Suite F606, 1364 Clifton Rd. NE, Atlanta, GA 30322.
Coronary Angioplasty Compared with Bypass Grafting
Hartz A. J., Kuhn E. M., Doorey A. J., Fischer J. E., Leesar M. A., Joseph S. A., Prince C. R., Hamm C. W., Berger J., Kalmar P., King S. B., Hillis L. D., Rutherford J. D.
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N Engl J Med 1995;
332:888-890, Mar 30, 1995.
Correspondence
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