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The Journal of Thoracic and Cardiovascular Surgery, Vol 106, 1192-1195, Copyright © 1993 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Internal thoracic artery: prevalence of atherosclerotic changes

HJ Sons, E Godehardt, J Kunert, B Losse and W Bircks
Department of Thoracic and Cardiovascular Surgery (Arbeitsgruppe Biometrie), Heinrich Heine-Universitaet, Duesseldorf, Germany.

Use of the internal thoracic artery for myocardial revascularization has regained general acceptance because it offers better long-term results than do venous conduits. The aim of this study was to ascertain the prevalence of atherosclerosis in the internal thoracic artery and to correlate the prevalence with other known risk factors. A total of 117 patients (male/female ratio 84:33; mean age 56.8 years) were investigated. Sixty-eight patients had coronary artery disease, 25 had combined coronary artery and valvular heart disease, 14 had acquired valvular heart disease, and 10 had other types of heart disease. All but one patient underwent bilateral semiselective internal thoracic arteriography. Evidence of atherosclerotic change was present in 6.6% of the opacified vessels in 11.1% of the investigated individuals. Although all patients with atherosclerotic lesions in the internal thoracic artery had coronary artery disease, no correlation could be found between coronary artery disease and internal thoracic atherosclerosis. Peripheral vascular disease and hyperlipidemia could be identified as predictors of atherosclerotic changes in the internal thoracic artery. Atherosclerosis is somewhat more prevalent in the internal thoracic artery in this study than in the literature. Although the internal thoracic artery is a protected vessel, there is a certain extent of atherosclerosis, that correlates with known risk factors. Our observations should not preclude use of the internal thoracic artery, but they should be considered for patients who are at risk for atherosclerotic changes of the internal thoracic artery.

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