Morphological and functional 3-Tesla magnetic resonance imaging of saphenous vein coronary artery bypass grafts

Hoppe, Hanno; Reineke, David; Rosskopf, Andrea Bianca; Czerny, Martin; Tevaearai, Hendrik; Hess, Otto; Carrel, Thierry; Ith, Michael (2011). Morphological and functional 3-Tesla magnetic resonance imaging of saphenous vein coronary artery bypass grafts. Interactive cardiovascular and thoracic surgery, 12(4), pp. 582-5. Oxford: Oxford University Press 10.1510/icvts.2010.255026

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Evaluation of a novel non-invasive tool for postoperative follow-up of patients postelective saphenous vein coronary artery bypass graft (CABG) was performed. Ten patients were included. Their bypass grafts supplied the right coronary artery (7), marginal branches (1), diagonal branches (2), and the circumflex artery (n=1). Each bypass was examined intraoperatively using Doppler flow measurement. Patients were examined with a 3-Tesla magnetic resonance imaging (MRI) scanner (MAGNETOM Verio, Siemens, Erlangen, Germany) within one week postsurgery using MR-angiography with an intravasal contrast agent and velocity encoded phase-contrast flow measurements. Intraoperative Doppler flow measurements revealed regular flow patterns in all vascular territories supplied. The median intraoperative flow rate was 50 ml/min with an inter-quartile range (IQR) of 42-70 ml/min. The clinical postoperative course was uneventful. MRI showed all grafts to be patent. The median postoperative flow rate was 50 ml/min (IQR: 32-65 ml/min). MRI flow rates agreed well with intraoperative Doppler flow measurements (mean difference: -2.8±20.1 ml/min). This initial study demonstrates that 3-Tesla MRI flow measurements correlated well with Doppler thus reconfirming the graft patency postCABG. Further refinement and broader application of this technique may facilitate follow-up postCABG potentially replacing empiric clinical judgment by reliable non-invasive imaging.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology
04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiovascular Surgery

UniBE Contributor:

Hoppe, Hanno; Czerny, Martin; Tevaearai, Hendrik; Carrel, Thierry and Ith, Michael

ISSN:

1569-9293

Publisher:

Oxford University Press

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:20

Last Modified:

06 Dec 2013 13:27

Publisher DOI:

10.1510/icvts.2010.255026

PubMed ID:

21245126

Web of Science ID:

000309995500026

URI:

https://boris.unibe.ch/id/eprint/6613 (FactScience: 211609)

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