Evaluation of coronary artery bypass grafts using helical scan computed tomography

✍ Scribed by Keishi Ueyama; Hirokazu Ohashi; Yasushi Tsutsumi; Takahiro Kawai; Tetsuyuki Ueda; Masateru Ohnaka

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 124 KB
• Volume: 46
• Category: Article
• ISSN: 1522-1946
• DOI: 10.1002/(sici)1522-726x(199903)46:3<322::aid-ccd12>3.0.co;2-e

✦ Synopsis

The patency of coronary artery bypass grafts was evaluated by helical computed tomographic (CT) scan. One hundred forty patients who received an enhanced chest CT scan and a coronary angiography after bypass surgery were studied before discharge at the Fukui Cardiovascular Center. Among them was a total of 398 grafts and 436 anastomoses. For the evaluation of 248 vein grafts, the CT scan showed a 99.5% correct positive ratio and an overall accuracy of 96.4%. In 122 internal thoracic arteries tested, an overall accuracy of 64.7% was obtained. In gastroepiploic artery tests the overall accuracy was 33.3% and in radial artery tests it was 45.5%. Thirty-seven venous sequential anastomoses in 34 grafts and 1 internal thoracic artery sequential anastomosis were also evaluated. In the venous sequential anastomosis, the CT scan showed a 73.0% of accuracy overall. This study showed that the helical CT scan was useful to evaluate graft patency following bypass surgery.