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Mao B, Feng Y, Duan M, Dong Y, Li G, Li B, Liu J, Guo Y, Wei M, Zhao Z, Liu Y. A Novel Method to Determine the Cause of Left Internal Mammary Artery Instant Non-Patency Based on Transit Time Flow Measurement. Front Physiol 2022; 13:901280. [PMID: 35845991 PMCID: PMC9280131 DOI: 10.3389/fphys.2022.901280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Objective: After coronary artery bypass grafting (CABG) surgery, the main causes of poor instant patency of left internal mammary arteries (LIMAs) are competitive flow and anastomotic stenosis, but how to determine the cause of LIMA non-patency without interfering with the native coronary artery is still a difficult problem to be solved urgently.Methods: In this study, a 0D-3D coupled multiscaled CABG model of anastomotic stenosis and competitive flow was constructed. After calculation, the flow waveform of the LIMA was extracted, and the waveform shape, common clinical parameters (average flow, PI, and DF), and graft flow FFT ratio results (F0/H1 and F0/H2) were analyzed.Results: For LIMA, these three common clinical parameters did not differ significantly between the anastomotic stenosis group and competitive flow group. However, the waveform shape and FFT ratio (especially F0/H2) of the competitive flow group were significantly different from those of the anastomotic stenosis group. When the cause was competitive flow, there was systolic backflow, and F0/H2 was too high (>14.89). When the cause was anastomotic stenosis, the waveform maintained a bimodal state and F0/H2 was in a normal state (about 1.17).Conclusion: When poor instant patency of the LIMA is found after CABG, the causes can be determined by graft flow waveform shape and F0/H2.
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Affiliation(s)
- Boyan Mao
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Yue Feng
- Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
- Medical Equipment Department, Peking University First Hospital, Beijing, China
| | - Mengyao Duan
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Yihang Dong
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Gaoyang Li
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Bao Li
- Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Jincheng Liu
- Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Yuting Guo
- Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Minghui Wei
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Zhou Zhao
- Cardiac Surgery Department, Peking University People’s Hospital, Beijing, China
| | - Youjun Liu
- Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
- *Correspondence: Youjun Liu,
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