Comparison of the waveforms of transit-time fl owmetry and intraoperative fl uorescence imaging for assessing coronary artery bypass graft patency
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Atsutoshi Hatada, MD Yoshitaka Okamura, MD, PhD Masahiro Kaneko, MD · Takahiro Hisaoka, MD Shuji Yamamoto, MD · Takeshi Hiramatsu, MD, PhD Yoshiha
- چاپ و سال / کشور: 2010
Description
Purpose. An intraoperative fl uorescence imaging (IFI) system, which can provide visual images, could be the common method for assessing graft patency intraoperatively. We conducted a prospective comparison of the diagnostic accuracy of both the fast Fourier transformation (FFT) analysis of transit-time fl owmetry (TTFM) waveform and the IFI system to determine graft failure. Methods. The study included 10 saphenous vein grafts (SVGs), all of which were aortocoronary grafts. Each patient underwent isolated coronary artery bypass grafting (CABG), including conventional CABG or off-pump CABG, and then underwent X-ray angiography after CABG. When intraoperative hemodynamics had stabilized, the grafts were evaluated with both the IFI system and TTFM. Based on the obtained fl ow profi le of TTFM, certain variables were calculated. The waveforms of TTFM were analyzed with the FFT series. Harmonic distortion (HD) was calculated from the amplitudes, and the fundamental frequency was thus determined using the FFT series. Results. The IFI system demonstrated a satisfactory fl ow of all grafts. X-ray angiography demonstrated that one SVG was 75% stenosed, and the others were patent. The mean graft fl ow (MGF) and the pulsatility index (PI) of the patent SVGs were not signifi cantly different from those of the stenosed SVG. The HD of the patent SVGs was signifi cantly different from that of the stenosed SVG. Conclusion. The HD of the TTFM waveform can provide better diagnostic accuracy for detecting clinically signifi - cant grafts than MGF and PI of TTFM and the IFI system
Gen Thorac Cardiovasc Surg (2011) 59:14–18 DOI 10.1007/s11748-010-0611-1 Received: 11 November 2008 / Accepted: 8 March 2010
