Key result
Real-time IVUS monitoring during transcatheter valve expansion helps avoid unnecessary chimney stenting.
Why the study?
Coronary obstruction is a rare but fatal complication after transcatheter aortic valve implantation, and concerns exist about chimney stenting in high-risk patients.
Case Report (n=1)
Intravascular ultrasound can be used for real-time monitoring of displaced native leaflets during TAVI to prevent unnecessary chimney stenting.
IVUS monitoring may avoid prophylactic chimney stenting in high-risk TAVI; leaves open its safety and efficacy in larger cohorts.
Coronary obstruction (CO) is a rare but fatal complication after transcatheter aortic valve implantation. "Prophylactic" chimney stenting is effective in patients with high CO risk; however, concerns about future coronary access and stent thrombosis have emerged. We experienced a case in which intravascular ultrasound enabled real-time monitoring of displaced native leaflets during a self-expandable transcatheter heart valve expansion, consequently avoiding chimney stenting. This case highlights the importance of intravascular ultrasound to accurately assess CO during self-expandable transcatheter aortic valve implantation and prevent unnecessary chimney stenting.
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Suenaga et al. (2025) conducted a case report in High coronary obstruction risk during transcatheter aortic valve implantation (n=1). Intravascular ultrasound for real-time leaflet monitoring was evaluated on Avoidance of chimney stenting. Intravascular ultrasound enabled real-time monitoring of displaced native leaflets during self-expandable transcatheter heart valve expansion, successfully avoiding unnecessary chimney stenting.
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