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The Annals of Thoracic Surgery, Vol 26, 525-534, Copyright © 1978 by The Society of Thoracic Surgeons
GN Olinger and LI Bonchek
Although the physiological benefits of left ventricular venting during
cardiopulmonary bypass have been documented experimentally, air embolus is
still a concern clinically, and surgeons, therefore, continue to debate
whether or not to vent routinely during coronary revascularization. In this
study, 10 patients vented during revascularization and 10 not vented were
studied immediately before and after cardiopulmonary bypass using Sarnoff
ventricular function curves to assess changes in ventricular performance.
Stroke work index by each patient before and after bypass was compared at
common left atrial pressures and concomitant similar systemic resistances.
In patients who were vented, there was overall no change in function (98
+/- 7% of control; range, 146--73%). In patients who were not vented, there
was overall significant depression of function (67 +/- 5% of control;
range, 91--45%, p less than 0.01). The overall absence of depression in
patients who were vented, several of whom had very poor ventricles before
bypass, strongly supports venting for coronary revascularization.
ARTICLES
Ventricular venting during coronary revascularization: assessment of benefit by intraoperative ventricular function curves
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