In the work by Zheng Quan MD et al. about the Use of Intraoperative Transit Time Flow Measurement Can Reduce Preoperative Myocardial Injury (1), the authors did a retrospective, observational study of the effects of exposure to the TTFM procedure . Fifty-nine people received TTFM, while 47 did not. In total, 7 (6.6%) had at least one grafting vessel obstruction. Only 1 patient where the TTFM was used had an occlusion graft vs. 6 patients where the TTFM was not used and had postoperative injury. In 2001, the use of TTFM techniques for assessing the quality of grafts intraoperatively, on the basis of the presence and volume of flow were clearly described) In conclusion, the work of Zheng Quan MD et al. remarks the importance of the use of TTFM to reduce the incidence of preoperative myocardial injury during off-pump coronary bypass surgery. support of, in some ways, the recent expert opinion to promote the use of TTFM