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Anatomic and functional correlates of intercoronary collateral vessels

1972; Elsevier BV; Volume: 30; Issue: 6 Linguagem: Inglês

10.1016/0002-9149(72)90597-8

1879-1913

Clifford N. Harris, Marvin A. Kaplan, David P. Parker, Wilbert S. Aronow, Myrvin Ellestad,

Acute Myocardial Infarction Research

One hundred eighty-one patients with angiographically documented coronary artery disease were investigated. Thirty-nine patients (21.5 percent) were found to have demonstrable intercoronary collateral vessels. Collateral vessels were seen only when occlusion of the luminal diameter of at least 1 vessel exceeded 75 percent. There was an increasing incidence of collateral vessels as the extent of coronary artery disease increased from 1- to 4-vessel involvement. Collateral vessels afforded no protection against myocardial ischemia as measured by treadmill stress test when the study group was compared with patients without collateral vessels whose disease was equally severe and at least as extensive.