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Transit-time flow measurement (TTFM) allows intraoperative functional assessment of grafts in coronary artery bypass grafting (CABG). The major limitation of this technique is a low positive predictive value (PPV) that could lead to unnecessary graft revisions. A combined approach with high-resolution epicardial ultrasonography (HR-ECUS) and TTFM was evaluated for the first time in terms of diagnostic accuracy. The aim of this study is to evaluate the added value of intraoperative HR-ECUS for an improved graft patency verification.

european journal of cardio-thoracic surgery

Intraoperative graft verification in coronary surgery: increased diagnostic accuracy adding high-resolution epicardial ultrasonography to transit-time flow measurement