Myocardial Oxygen Utilization During Left Heart Bypass
- 1 November 1974
- journal article
- research article
- Published by American Medical Association (AMA) in Archives of Surgery
- Vol. 109 (5) , 635-641
- https://doi.org/10.1001/archsurg.1974.01360050029008
Abstract
Myocardial oxygen utilization during left heart bypass was studied in a preparation where a mean aortic pressure of 75 mm Hg and a heart rate of 100 beats per minute were kept constant. The relationship of reduction of myocardial oxygen consumption (MVO2) as bypass increased was nonlinear. A partial bypass flow as high as 80% produced a decrease in MVO2 of only 15% from controls. Thereafter, MVO2 decreased rapidly to a maximum reduction of 50% from controls with complete left ventricular bypass with left ventricular decompression. This study indicates that the maximum benefit in salvaging marginal ischemic muscle with the use of left ventricular bypass would be expected to occur with complete left ventricular bypass and left ventricular decompression.Keywords
This publication has 2 references indexed in Scilit:
- Response of myocardial fiber length to left heart bypassJournal of Surgical Research, 1969
- Diastolic balloon pumping (with carbon dioxide) in the aorta—A mechanical assistance to the failing circulationAmerican Heart Journal, 1962