Ventricular fibrillation without left ventricular venting. Observations in humans.

The Annals of Thoracic Surgery
H H ZwartR A DeWall

Abstract

Pressures were measured in the heart and great vessels of 52 patients who underwent coronary revascularization. In 25 patients the left ventricle was vented during fibrillation; in the others a vent was not used. Samples for blood gas analysis were obtained twice during fibrillation from the aorta, left atrium, pulmonary artery, and right atrium. Left ventricular venting was found to be effective in keeping mean left heart pressure below 10 mm Hg, although temporary incompetence of the aortic valve or malfunction of the vent occasionally caused higher pressures. Vent use led to air embolism in the aorta in 16% of the patients. In the nonvented patients mean left heart pressures remained between 10 and 20 mm Hg. However, higher values were frequently observed. Blood gas analysis demonstrated that without venting, retrograde pulmonary flow occurred during fibrillation. No abnormality was encountered that could be related to nonventing.

References

Apr 1, 1958·Cleveland Clinic Quarterly·W J KOLFFL J McCORMACK

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Citations

Nov 1, 1978·World Journal of Surgery·A S Wechsler
May 1, 1985·Canadian Anaesthetists' Society Journal·R J ByrickT A Salerno
Nov 1, 1981·The Annals of Thoracic Surgery·S K LucasT J Gardner
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Dec 1, 1977·Angiology·A May
Jan 1, 1990·Acta Anaesthesiologica Scandinavica. Supplementum·S A TishermanP Safar

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