One-year performance of biorestorative polymeric coronary bypass grafts in an ovine model: correlation between early biomechanics and late serial Quantitative Flow Ratio
| Autor: | Xinlei Wu, Masafumi Ono, Eric K W Poon, Neil O'Leary, Ryo Torii, Johannes P Janssen, Shuang Jie Zhu, Yves Vijgeboom, Mohammed S El-Kurdi, Martijn Cox, Jochen Reinöhl, Jouke Dijkstra, Peter Barlis, William Wijns, Johan H C Reiber, Christos V Bourantas, Renu Virmani, Yoshinobu Onuma, Patrick W Serruys |
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| Rok vydání: | 2022 |
| Předmět: |
Pulmonary and Respiratory Medicine
Sheep Superficial wall strain General Medicine Coronary Angiography Biomechanical Phenomena Quantitative flow ratio Coronary artery bypass graft Animals Humans Surgery Biodegradable and bioresorbable polymer Stress Mechanical Cardiology and Cardiovascular Medicine Vascular Patency |
| Zdroj: | European Journal of Cardio-Thoracic Surgery, 61(6), 1402-1411. OXFORD UNIV PRESS INC |
| ISSN: | 1873-734X 1010-7940 |
| DOI: | 10.1093/ejcts/ezab554 |
| Popis: | OBJECTIVES This study aimed to investigate the impact of mechanical factors at baseline on the patency of a restorative conduit for coronary bypass grafts in an ovine model at serial follow-up up to 1 year. METHODS The analyses of 4 mechanical factors [i.e. bending angle, superficial wall strain and minimum and maximum endothelial shear stress (ESS)] were performed in 3D graft models reconstructed on baseline (1-month) angiograms frame by frame by a core laboratory blinded for the late follow-up. The late patency was documented by Quantitative Flow Ratio (QFR®) that reflects the physiological status of the graft. The correlation between 4 mechanical factors and segmental QFR (△QFR) were analysed on 10 equal-length segments of each graft. RESULTS A total of 69 graft geometries of 7 animals were performed in the study. The highest △QFR at 12 months was colocalized in segments of the grafts with the largest bending angles at baseline. Higher △QFR at 3 months were both at the anastomotic ends and were colocalized with the highest superficial wall strain at baseline. High baseline ESS was topographically associated with higher △QFR at the latest follow-up. Correlations of minimum and maximum ESS with △QFR at 3 months were the strongest among these parameters (ρ = 0.30, 95% CI [−0.05 to 0.56] and ρ = 0.27, 95% CI [−0.05 to 0.54], respectively). CONCLUSIONS Despite the limited number of grafts, this study suggests an association between early abnormal mechanical factors and late flow metrics of the grafts. The understanding of the mechanical characteristics could help to improve this novel conduit. |
| Databáze: | OpenAIRE |
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