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Ann Thorac Surg 1983;35:152-155
© 1983 The Society of Thoracic Surgeons

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Articles

Left Ventricular Function in Patients with Ventricular Arrhythmias and Aortic Valve Disease

From the Department of Internal Medicine, Divisions of Cardiology and Nuclear Medicine, and the Department of Surgery, Section of Thoracic Surgery, University of Michigan Medical Center, Ann Arbor, MI

Accepted for publication January 5, 1982.

Forty patients having aortic valve replacement were evaluated preoperatively for ventricular arrhythmia and left ventricular ejection fraction. Arrhythmias were classified as complex or simple using the Lown criteria on the 24-hour ambulatory electrocardiogram; ejection fractions were determined by radionuclide gated blood pool analysis and contrast angiography. The ejection fractions determined by radionuclide angiography were 59.1 ± 13.1% for 26 patients with simple or no ventricular arrhythmias, and 43.9 ± 20.3% for 14 patients with complex ventricular arrhythmias (p < 0.01). Ejection fractions determined by angiography, available for 31 patients, were also lower in patients with complex ventricular arrhythmias (61.1 ± 16.3% versus 51.4 ± 13.4%; p < 0.05). Seven of 9 patients showing conduction abnormalities on the electrocardiogram had complex ventricular arrhythmias. Eight of 20 patients with aortic stenosis had complex ventricular arrhythmias, while 2 of 13 patients with aortic insufficiency had such arrhythmias. It is concluded that decreased left ventricular ejection fraction, intraventricular conduction abnormalities, and aortic stenosis are associated with an increased frequency of complex ventricular arrhythmias in patients with aortic valve disease.

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