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European Heart Journal 1987 8(5):444-448;
Copyright © 1987 by the European Society of Cardiology.
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© 1987 The European Society of Cardiology

Coronary bypass surgery in exercise-induced ventricular tachycardia

K. RASMUSSEN, P. I. LUNDE and M. LIE

Section of Cardiology, Department of Medicine and Division of Thoracic and Cardiovascular Surgery, Department of Surgery Tromso, Tromso, Norway

Received 30 June 1986; revised 6 October 1986; .

Address for correspondence Professor K. Rasmussen, Section of Cardiology Medical Department, University Hospital of Tromso, 9012 Tromso, Norway.

Abstract

Among 400 consecutive patients undergoing conventional isolated bypass surgery, 9 patients had clinical and electrocardiographic evidence of severe ischaemia during exercise and serious exercise-induced ventricular arrhythmias. Four patients had spontaneous exercise-induced arrhythmias and two had been resuscitated for out-of-hospital cardiac arrest. Postoperatively all patients were free of angina, off anti-anginal drugs with considerably increased exercise capacity and maximal heart rate during exercise. No spontaneous or exercise induced arrhythmias have recurred during observation periods ranging from one to four and a half years. In this subset of patients ischaemia seems to be the crucial arrhythmia-inducing factor and bypass surgery alone may therefore be therapeutic. The reduction of ischaemic exercise-induced arrhythmias may be one way by which bypass surgery reduces mortality in larger patient series.

Key Words: Angina pectoris • ventricular tachycardia • exercise testing


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