Document Detail

Evaluation of left ventricular function utilizing transesophageal echocardiography during and after thoracic aortic aneurysm repair.
MedLine Citation:
PMID:  8373621     Owner:  NLM     Status:  MEDLINE    
This study was designed to evaluate left ventricular (LV) function during aortic cross-clamping (ACC) by comparing left heart bypass (LHB) with a centrifugal pump and simple aortic cross-clamping (SC). The end-diastolic volume index (EDVI), ejection fraction (EF), fractional shortening (FS) and end-systolic meridional stress (ESS) were measured by transesophageal echocardiography. The measurements were performed 1) before ACC, 2) 2 min after ACC, 3) 20 min after ACC, 4) 2 min after unclamping and 5) 1 h after unclamping. With cross-clamping, a significant decrease was observed in both EDVI (108 vs 83 ml/m2) and EF (73 vs 67%) in patients with LHB. Patients utilizing SC showed a sustained increase in ESS (43 vs 64 10(3) dyne/cm2). The systolic blood pressure did not vary during LHB, but a transient increase occurred in patients with SC. With release of the cross-clamping, EDV and EF returned to the baseline values in patients with LHB. A significant decrease occurred in EDVI (101 vs 71 ml/m2) and ESS (61 vs 36 10(3) dyne/cm2) in the SC group. We conclude that circulatory support with LHB may offer greater stability of the LV function during thoracic aortic cross-clamping than SC because of the lower preload and afterload.
H Imagawa; H Takano; M Kato; Y Yoshioka; K Ohnishi
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery     Volume:  7     ISSN:  1010-7940     ISO Abbreviation:  Eur J Cardiothorac Surg     Publication Date:  1993  
Date Detail:
Created Date:  1993-10-21     Completed Date:  1993-10-21     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8804069     Medline TA:  Eur J Cardiothorac Surg     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  371-5     Citation Subset:  IM    
Division of Cardiovascular Surgery, Osaka Prefectural Hospital, Japan.
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MeSH Terms
Aged, 80 and over
Aortic Aneurysm, Thoracic / physiopathology*,  surgery*,  ultrasonography
Blood Pressure
Cardiac Surgical Procedures / methods
Echocardiography* / methods
Heart Rate
Middle Aged
Monitoring, Intraoperative
Postoperative Care
Stroke Volume / physiology
Ventricular Function, Left / physiology*

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