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Fast Fourier transform analysis of intraoperative transit-time flow measurement during coronary artery bypass grafting
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Fast Fourier transform analysis of intraoperative transit-time flow measurement during coronary artery bypass grafting
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Fast Fourier transform analysis of intraoperative transit-time flow measurement during coronary artery bypass grafting
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Journal Article
Fast Fourier transform analysis of intraoperative transit-time flow measurement during coronary artery bypass grafting
2024
Overview
As the current guidelines on myocardial revascularization recommend, transit-time flow measurement (TTFM) is increasingly used for intraoperative graft flow analysis during coronary artery bypass grafting (CABG) as a less invasive, more highly reproducible, and less time-consuming method. In addition to the morphological assessment using color Doppler, mean graft flow (Qm) > 15 ml/min, pulsatility index (PI) < 5.0, diastolic filling (DF) > 50%, and systolic reverse flow (SRF) < 4% have been reported to predict patent CABG grafts. However, it is difficult to determine the clear-cut cut-off value of these parameters, because they varies with the hemodynamic characters, including fractional flow reserve (FFR) of the target coronary artery. In addition to these parameters, we focused on fast Fourier transform (FFT) analysis, because the TTFM waveform morphology may be more important than Qm itself. FFT analysis is based on the principle that any periodic waveforms can be broken down into a series of pure sine waves or harmonics. Herein we review FFT analysis of the intraoperative TTFM waveforms for quality assessment of CABG grafts.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Blood Flow Velocity - physiology
/ Bypass
/ Coronary Artery Bypass - methods
/ Coronary artery bypass grafting
/ Coronary Circulation - physiology
/ Coronary Vessels - diagnostic imaging
/ Coronary Vessels - physiopathology
/ Fast Fourier transformations
/ Flow Measurement in Coronary Artery Surgery
/ Grafting
/ Humans
/ Ischemia
/ Medicine
/ Monitoring, Intraoperative - methods
/ Review
/ Surgery
/ Transit
