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Case Reports in Cardiology
Volume 2017, Article ID 3186047, 3 pages
Case Report

False Positive Transit Time Flowmetry Graft Failure in Multivessel Coronary Spasm following Off-Pump Coronary Artery Bypass Grafting

1Cardiology Department, Gloucestershire Hospitals NHS Foundation Trust, Cheltenham, UK
2Oxford Heart Centre, Oxford University Hospital, Oxford, UK

Correspondence should be addressed to George Kassimis; rg.oohay@puskg

Received 23 March 2017; Accepted 8 May 2017; Published 28 May 2017

Academic Editor: Ertuğurul Ercan

Copyright © 2017 George Kassimis and George Krasopoulos. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Intraoperative Transit Time Flowmetry is currently recommended to assess graft patency during coronary artery bypass grafting (CABG), especially in presence of haemodynamic instability or inability to wean the patient from cardiopulmonary bypass, new regional wall motion abnormalities, or significant ventricular arrhythmias. The VeriQ™ system is one of the currently available systems, which detects imperfections that may be corrected by graft revision. In this case report, multivessel coronary spasm (CS) post-CABG interferes with these intraoperative parameters misleading initially into false results. Cardiac surgeons should bear in mind the limit of VeriQ in distinguishing between graft failure and CS. Angiography may be considered in patients with decreased graft flow despite revision of anastomosis and vasodilatory treatment for the definitive diagnosis.