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Extra-ascending aortic versus intra-descending aortic balloon counterpulsation-effect on coronary artery blood flow


Davies, AN and Peters, WS and Su, T and Sullivan, CE and Perkidides, T and Milsom, FP and White, G, Extra-ascending aortic versus intra-descending aortic balloon counterpulsation-effect on coronary artery blood flow, Heart, Lung and Circulation, 14, (3) pp. 178-186. ISSN 1443-9506 (2005) [Refereed Article]

DOI: doi:10.1016/j.hlc.2005.03.018


Background: Diastolic counterpulsation has been used to provide circulatory augmentation for chronic heart failure or for short-term cardiac support. Recently an extra-aortic balloon (EAB) counterpulsation device has been proposed. Aim: To compare the circulatory effects of counterpulsation using the EAB or an intra-aortic balloon (IAB) in the acute pig model. Methods: In six anaesthetized great white pigs (paced at 100 bpm), ECG, arterial and central venous pressures, flow in the coronary circulation and descending thoracic aorta were measured. Baseline data was collected, then with the EAB or an IAB fitted using 1:1 and 1:2 counterpulsation modes. Baseline data was compared to EAB and IAB data in 1:1 mode. Assisted beat data compared to unassisted beat data was also analysed in 1:2 mode. Results: Both devices augmented peak diastolic arterial pressure, and decreased afterload. EAB counterpulsation increased diastolic coronary flow in both the 1:1 mode by 69% (p < 0.05) and in the 1:2 mode by 63% (assisted versus unassisted beat, p < 0.05). The IAB significantly increased diastolic coronary flow only in the 1:2 mode by 28% (p < 0.01). Both devices augmented total coronary flow and some augmentation of aortic flow was observed. Conclusion: The circulatory effect of the EAB and IAB counterpulsation were comparable. This suggests the EAB could be used as a non-blood contacting heart assist device in patients suffering moderate-severe heart failure. © 2005 Australasian Society of Cardiac and Thoracic Surgeons and the Cardiac Society of Australia and New Zealand. Published by Elsevier Inc. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Cardiovascular medicine and haematology
Research Field:Cardiology (incl. cardiovascular diseases)
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Davies, AN (Dr Andrew Davies)
ID Code:33438
Year Published:2005
Deposited By:Health Sciences A
Deposited On:2005-08-01
Last Modified:2011-10-07

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