Why the study?
Does MRI and colour Doppler ultrasound accurately detect graft patency in patients with right gastroepiploic artery coronary bypass grafts compared to conventional angiography?
Does MRI and colour Doppler ultrasound accurately detect graft patency in patients with right gastroepiploic artery coronary bypass grafts compared to conventional angiography?
MRI is a highly accurate, noninvasive method for evaluating the patency of right gastroepiploic artery coronary bypass grafts.
Answers are grounded in this paper and cite their sources.
MRI may support noninvasive patency assessment after gastroepiploic grafting; leaves open larger prospective validation before practice change.
The right gastroepiploic artery, increasingly used as an in situ coronary artery bypass graft, has good long-term patency. This study aimed to assess the accuracy and limitations of magnetic resonance imaging (MRI) and colour Doppler ultrasound (US) in postoperative follow-up of such cases. In eight consecutive patients (6 men, 2 women, mean age 57 years), conventional angiography, MRI and US were performed to evaluate graft patency. Colour Doppler US, performed within a week of the operation, correctly detected flow in three patent grafts. MRI (1.5 tesla) was performed c. 17 months after surgery, using a spine coil and a coronal two-dimensional Flash-type imaging sequence. At angiography six of the eight gastroepiploic artery grafts were patent, and two were occluded. The sensitivity and specificity of MRI were 100%. This accuracy makes MRI a promising method for noninvasive post-operative evaluation of right gastroepiploic artery graft patency.
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Vanninen et al. (1995) studied this question.
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