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© 1981 Oxford University Press

research-article

LEFT VENTRICULAR PERFORMANCE IN ATRIAL FIBRILLATION IN THE ELDERLY

F. I. CAIRD, Devid Cargill Professor of Geriatric Medicine and B. O. WILLIAMS, Senior Lecturer

University Department of Geriatric Medicine Southem General Hospital, Glasgow G51 4TF

Ejection fraction was measured directly by a radionuclide method, and indirectly from systolictime intervals, in elderly patients in atrial fibrillation. Both methods show that the ejection fractionaverages approximately 55% at mean ventricular rates of 50–70 beats/min and falls to 20% orbelow as mean rate increases to over 120 beats/min. Atrial fibrillation is thus associated with adecrease in left ventricular performance, which is accentuated by increasing ventricular rates.


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