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Aortic Dissection After Previous Coronary Artery Bypass Grafting

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Aortic dissection after coronary artery bypass grafting (CABG) is a rare but potentially fatal complication. The aim of this study was to identify the reasons. Between 1991 and 2000 in our institution CABG was performed on 22,732 patients. In the same time interval 12 (0.5°/00) patients presented with an aortic dissection after previous CABG. Age: 59.1 ± 5.9 years, gender: 10/2, only Stanford A dissections, 4 chronic and 8 acute dissections, mortality: 3, all acute. 2 died of cardiac complications (left heart failure), 1 of other complications (gastrointestinal ischemia). The time interval between CABG and dissection was 2.5 ± 3.6 years. Two dissections were intraoperative, another 5 were within the first year; the longest time interval was 10 years. In 5 cases the entry originated from a central anastomosis, 1 originated from the aortic cannulation site, and 1 from the site of the cross clamping. In 5 cases the entry was not directly related to the previous operation (1 was located in close proximity to the left coronary ostium, 2 between aortic valve annulus and the coronary ostia and 2 between the distal coronary arteries in the ascending aorta). Pathological changes of the aorta were not described at the time of CABG; only in 1 case a mild aortic regurgitation and dilatation (47 mm) at the time of the first operation was described. As our results suggest an aortic dissection presenting after CABG must be considered to be a rare complication of the previous operation. Considering the severity of this complication satisfying results can be achieved. (J Card Surg 2003;18:519-523)
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Document Type: Research Article

Affiliations: 1: Department of Thorax and Cardiovascular Surgery, Heart and Diabetes Center, Northrhine-Westfalia, Bad Oeynhausen, Germany 2: Department of Pathology, Städtische Kliniken Bielefeld, Bielefeld, Germany

Publication date: November 1, 2003

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