Immediate effects of mammary artery revascularization versus saphenous vein on global and regional myocardial function: an intraoperative echocardiographic assessment
| Autor: | Alyson N. Owen, Ernst Wolner, Werner Mohl, W. Zwoelfer, Rainald Seitelberger, Reinhard Moidl, Paul Simon, Friederike Neumann |
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| Rok vydání: | 1991 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty medicine.medical_treatment Area change Revascularization law.invention Coronary artery bypass surgery law Internal medicine Monitoring Intraoperative medicine Cardiopulmonary bypass Myocardial Revascularization Humans Saphenous Vein Thoracotomy Coronary Artery Bypass Vein Aged business.industry Hemodynamics Heart Middle Aged Myocardial function medicine.anatomical_structure Echocardiography Mammary artery Cardiology Surgery Cardiology and Cardiovascular Medicine business |
| Zdroj: | The Thoracic and cardiovascular surgeon. 39 |
| ISSN: | 0171-6425 |
| Popis: | The immediate effect of coronary artery bypass surgery on global and regional myocardial function using the internal mammary artery (IMA) versus saphenous vein (SV) was studied intraoperatively using transesophageal echocardiography (TEE). Thirty-two patients received an IMA and 10 patients only SV. Transesophageal echocardiography was recorded before thoracotomy, 5 minutes after the end of cardiopulmonary bypass (CPB) and after chest closure. Global and regional left ventricular function were expressed as a percent of the short axis area change (%SAAC) and a percent of the fractional area change (%FAC), respectively. Segments were classified according to their baseline function as normal, %FAC greater than 40%, or dysfunctional, %FAC less than 40%. Only normal segments were considered in this study. No significant change in %SAAC in either group was observed in this study. Internal mammary artery revascularized segments showed a significant decrease in %FAC from 57 +/- 1 before thoractomy to 53 +/- 2 5 minutes after CPB, whereas SV segments showed a significant improvement in %FAC from 56 +/- 1 to 61 +/- 1. Applying strict criteria derived from intraobserver and cycle-to-cycle variability, 17% of IMA segments had deteriorated by more than 36% whereas only 4% of SV segments showed such deterioration. Conversely, 17% of SV segments showed an increase in %FAC by more than 36% and only 3% of IMA segments improved similarily. The observed changes were of short duration and had largely resolved by chest closure.(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: | OpenAIRE |
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