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<p>Coronary obstruction following transcatheter aortic valve-in-valve implantation (VIV-TAVI) carries a high mortality risk. This in-vitro study assessed coronary perfusion in a high-risk VIV-TAVI scenario. A patient deemed at high-risk and treated with preventive Chimney stenting was selected as case study. A 3D-printed aortic root model was fabricated from pre-operative imaging and used to replicate the patient’s VIV-TAVI setting. A CoreValve-Evolut-23 was implanted within a Trifecta-19 at five depths, with commissural alignment and 60° misalignment, to explore procedural variability and associated risk margins. The model was tested in a pulsatile mock loop with a coronary perfusion simulator. Flow and pressure were recorded pre- and post-VIV-TAVI under physiological conditions. Across all tested configurations, VIV-TAVI didn’t significantly impair left or right coronary flows. The recommended depth optimized hemodynamic valve performance. Findings suggest refining coronary obstruction risk stratification in VIV-TAVI to improve decision-making regarding preventive interventions.</p> Graphical Abstract <p></p>

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In Vitro Assessment of Coronary Perfusion after Valve-in-Valve Transcatheter Aortic Valve Implantation in a High-Risk Patient-Specific Experimental Model

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Francesca Perico,
  • Claudia Romagnoni,
  • Fabio Pappalardo,
  • Guido Gelpi,
  • Gianfranco Beniamino Fiore,
  • Riccardo Vismara

摘要

Coronary obstruction following transcatheter aortic valve-in-valve implantation (VIV-TAVI) carries a high mortality risk. This in-vitro study assessed coronary perfusion in a high-risk VIV-TAVI scenario. A patient deemed at high-risk and treated with preventive Chimney stenting was selected as case study. A 3D-printed aortic root model was fabricated from pre-operative imaging and used to replicate the patient’s VIV-TAVI setting. A CoreValve-Evolut-23 was implanted within a Trifecta-19 at five depths, with commissural alignment and 60° misalignment, to explore procedural variability and associated risk margins. The model was tested in a pulsatile mock loop with a coronary perfusion simulator. Flow and pressure were recorded pre- and post-VIV-TAVI under physiological conditions. Across all tested configurations, VIV-TAVI didn’t significantly impair left or right coronary flows. The recommended depth optimized hemodynamic valve performance. Findings suggest refining coronary obstruction risk stratification in VIV-TAVI to improve decision-making regarding preventive interventions.

Graphical Abstract