Surgical Measures for Coronary Heart Disease

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Abstract
(Third of Three Parts)Effect of Coronary-Artery Bypass on LongevityThe lack of controlled randomized studies comparing long-term survival in medically versus surgically treated patients with coronary-artery disease makes statistical analysis difficult. Use of a medically treated group of patients predating current surgical experience for comparative data is subject to the criticism that some forms of current medical therapy were not available for that group of patients. Nonrandomized studies may also be preselected in that patients with diffuse coronary-artery occlusive disease or poor left ventricular function are often not selected for operation, thus possibly weighting the medical group with a . . .

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