| Reversal of left ventricular dysfunction early after coronary artery bypass grafting. | |
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MedLine Citation:
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PMID: 1600528 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study evaluated the early effect of coronary artery bypass grafting (CABG) on left ventricular systolic function. Intraoperative echocardiography was performed in 32 patients with coronary artery disease and chronic, stable angina pectoris. Left ventricular short-axis images at mid-papillary muscle level were videotaped at similar loading conditions shortly after pericardiotomy and 28 +/- 5 min after weaning from cardiopulmonary bypass. Inotropic or vasodilator administration was avoided or suspended at least 5 min before echocardiography. The left ventricle was divided off-line into 8 segments. The ejection fraction and percent systolic wall thickening (PSWT) were calculated pre- and post-CABG. A total of 256 myocardial segments were analyzed. Any segment showing a preoperative PSWT of less than 30% was considered dysfunctional, while segments with a PSWT of greater than 30% were considered normal. After surgery, the PSWT in 162 dysfunctional segments (63%) increased from 11.8 +/- 8.9 to 24.3 +/- 14.3% (p less than 0.001). Conversely, a reverse trend was found in the remaining 94 normal segments (37%) with a decreasing PSWT from 46.2 +/- 13.8 to 33.4 +/- 14.8% (p less than 0.001). Ejection fraction also increased from 47.2 +/- 3.5 to 58.5 +/- 18.9% (p less than 0.05). Thus, CABG is followed by an immediate recovery of systolic function in dysfunctional myocardial segments, while compensatory hyperfunction is reduced in normal segments. These results indicate that the post-CABG improvement in PSWT is due to redistribution of coronary blood flow, rather than to pharmacological or hormonal influences. Intraoperative echocardiography is a useful technique to monitor left ventricular function during surgery. |
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Authors:
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P Voci; F Bilotta; G Scibilia; Q Caretta; C Mercanti; B Marino |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Cardiologia (Rome, Italy) Volume: 37 ISSN: 0393-1978 ISO Abbreviation: Cardiologia Publication Date: 1992 Feb |
Date Detail:
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Created Date: 1992-07-10 Completed Date: 1992-07-10 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8506637 Medline TA: Cardiologia Country: ITALY |
Other Details:
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Languages: eng Pagination: 105-11 Citation Subset: IM |
Affiliation:
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II Cattedra di Cardiologia, Università degli Studi La Sapienza, Roma, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Coronary Artery Bypass* Coronary Circulation Echocardiography Female Heart / physiology* Humans Intraoperative Period Male Middle Aged Monitoring, Physiologic Stroke Volume Time Factors |
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