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Titolo:
OUTCOME OF BYPASS-SURGERY IN PATIENTS WITH CHRONIC ISCHEMIC LEFT-VENTRICULAR DYSFUNCTION - PREDICTIVE VALUE OF MR-IMAGING
Autore:
KLOW NE; SMITH HJ; GULLESTAD L; SEEM E; ENDRESEN K;
Indirizzi:
UNIV OSLO,RIKSHOSP,RONTGEN RADIUM AVD N-0027 OSLO NORWAY UNIV OSLO,NATL HOSP,DEPT RADIOL OSLO NORWAY UNIV OSLO,NATL HOSP,DEPT CARDIOL OSLO NORWAY UNIV OSLO,NATL HOSP,DEPT CARDIOVASC SURG OSLO NORWAY
Titolo Testata:
Acta radiologica
fascicolo: 1, volume: 38, anno: 1997,
pagine: 76 - 82
SICI:
0284-1851(1997)38:1<76:OOBIPW>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORONARY-ARTERY DISEASE; NUCLEAR-MAGNETIC-RESONANCE; DOBUTAMINE STRESS; HYPERTROPHIC CARDIOMYOPATHY; VIABLE MYOCARDIUM; WALL THICKNESS; HEART-DISEASE; QUANTITATION; TOMOGRAPHY; MOTION;
Keywords:
HEART, ISCHEMIA; MR IMAGING; SURGERY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
N.E. Klow et al., "OUTCOME OF BYPASS-SURGERY IN PATIENTS WITH CHRONIC ISCHEMIC LEFT-VENTRICULAR DYSFUNCTION - PREDICTIVE VALUE OF MR-IMAGING", Acta radiologica, 38(1), 1997, pp. 76-82

Abstract

Purpose: To determine the preoperative findings of MR imaging of the left ventricle (LV) that could best predict the functional outcome of the LV after surgical revascularization. Material and Methods: Patients with angina pectoris, previous myocardial infarction, and dysfunction of the LV, and who had a preoperative cine MR, were re-evaluated after bypass surgery with MR in a study on the effects of revascularization after mean 22 months. Results: Angina pectoris was relieved in all patients except one, but the maximum workload during the exercise testwas increased in only 3 patients. Coronary angiography showed that 37or 45 (82%) of the distal anastomoses were open. The LV ejection fraction was the same before and after operation both at angiography and MR imaging. MR showed LV end-diastolic volume to be increased from 190+/-50 ml to 250+/-70 ml. Compared to angiography, MR provided additional information regarding myocardial wall thickness and function, and the size of myocardial infarction. Improvement in systolic wall thickening was seen in 65% of the segments that had had an end-diastolic wall thickness (EDWT) greater than 15 mm before operation, while only 4% ofthe segments with EDWT <6 mm improved. In the wall thickness range of6-15 mm, MR was unable to predict the functional outcome of the LV. Conclusion: Preoperative MR findings of thick myocardial walls with poor function seem predictive of improved function after revascularization. When the LV wall thickness is less than 6 mm, no improvement shouldbe expected.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:47:40