Document Detail

Overcoming right ventricular failure with left ventricular assist devices.
MedLine Citation:
PMID:  9402511     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Right ventricular failure can lead to circulatory collapse while on left ventricular assist device support. By shunting blood from the femoral vein to the left ventricular assist device, cardiac output can be increased, but arterial oxygen saturation will decrease. METHODS: To determine the effects on O2 delivery, a model was developed on the basis of O2 uptake in the lungs and whole body O2 consumption. An equation was derived that related cardiac output, pulmonary venous O2 saturation, O2 consumption, and the ratio of shunt-to-systemic blood flow to systemic O2 delivery. RESULTS: When total cardiac output increases, the shunt will increase systemic O2 delivery while decreasing arterial O2 saturation and leaving systemic venous O2 saturation unaltered. When total output does not increase, the shunt will decrease systemic O2 delivery, arterial O2 saturation, and systemic venous O2 saturation. CONCLUSIONS: The analysis suggests that measuring systemic venous oxygen saturation may be a useful way to monitor patient safety. A decrease in systemic venous O2 saturation when creating the shunt implies an inadequate increase in cardiac output.
W P Santamore; E H Austin; L Gray
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation     Volume:  16     ISSN:  1053-2498     ISO Abbreviation:  J. Heart Lung Transplant.     Publication Date:  1997 Nov 
Date Detail:
Created Date:  1998-03-06     Completed Date:  1998-03-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9102703     Medline TA:  J Heart Lung Transplant     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1122-8     Citation Subset:  IM    
Jewish Hospital Cardiothoracic Surgical Research Institute, Division of Thoracic and Cardiovascular Surgery, University of Louisville, Ky., USA.
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MeSH Terms
Cardiac Output / physiology
Heart-Assist Devices*
Lung / physiology
Models, Theoretical
Oxygen / blood
Oxygen Consumption / physiology
Ventricular Dysfunction, Right / therapy*
Reg. No./Substance:

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