Document Detail


Effects of Intra-aortic Balloon Pump Counterpulsation on Left Ventricular Mechanoenergetics in a Porcine Model of Acute Ischemic Heart Failure.
MedLine Citation:
PMID:  25376149     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We investigated the effects of intra-aortic balloon pump (IABP) counterpulsation on left ventricular (LV) contractility, relaxation, and energy consumption and probed the underlying physiologic mechanisms in 12 farm pigs, using an ischemia-reperfusion model of acute heart failure. During both ischemia and reperfusion, IABP support unloaded the LV, decreased LV energy consumption (pressure-volume area, stroke work), and concurrently improved LV mechanical performance (ejection fraction, stroke volume, cardiac output). During reperfusion exclusively, IABP also improved LV relaxation (tau) and contractility (Emax, PRSW). The beneficial effects of IABP support on LV relaxation and contractility correlated with IABP-induced augmentation of coronary blood flow. In conclusion, we find that during both ischemia and reperfusion, IABP support optimizes LV energetic performance (decreases energy consumption and concurrently improves mechanical performance) by LV unloading. During reperfusion exclusively, IABP support also improves LV contractility and active relaxation, possibly due to a synergistic effect of unloading and augmentation of coronary blood flow.
Authors:
Konstantinos Malliaras; Efstratios Charitos; Nikolaos Diakos; Iraklis Pozios; Apostolos Papalois; John Terrovitis; John Nanas
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-7
Journal Detail:
Title:  Journal of cardiovascular translational research     Volume:  -     ISSN:  1937-5395     ISO Abbreviation:  J Cardiovasc Transl Res     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-7     Completed Date:  -     Revised Date:  2014-11-8    
Medline Journal Info:
Nlm Unique ID:  101468585     Medline TA:  J Cardiovasc Transl Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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