An interventional study of Double-Tap Balloon Post-dilatation and Conventional Single-Inflation TAVI in Severe Aortic Stenosis, sponsored by Yonsei University. Not yet recruiting. Open to participants aged 19 Years and older. Per ClinicalTrials.gov, last updated 2026-11-03.
Sponsored by Yonsei University · Not applicable, Interventional, and Treatment
This study will compare two balloon inflation strategies during transcatheter aortic valve implantation (TAVI), a procedure used to replace a severely narrowed aortic valve through a catheter. A balloon-expandable replacement valve may not fully expand during its initial placement. An additional inflation using the same balloon and the same inflation volume, called "Double-Tap," may improve valve expansion and function. Its benefits and risks need to be evaluated in a randomized trial.
This prospective, multicenter study aims to include 250 adults with symptomatic severe aortic stenosis undergoing TAVI with an Edwards SAPIEN-family balloon-expandable valve. After successful valve implantation, participants for whom an additional inflation is considered technically feasible and clinically appropriate will be randomly assigned in equal numbers to Double-Tap or conventional single inflation. Patients requiring therapeutic post-dilatation for moderate or greater leakage around the implanted valve will not undergo randomization.
The main question is whether Double-Tap improves valve expansion immediately after TAVI, as measured using fluoroscopic X-ray images. The study will also compare blood flow through the valve, valve expansion and signs of valve thrombosis on cardiac computed tomography, procedure-related complications, and clinical outcomes. Participants will undergo echocardiography before discharge and at 3-6 and 12 months, and cardiac computed tomography at 3-6 months. Clinical follow-up will continue for at least 12 months, with annual follow-up thereafter until the last enrolled participant completes the 12-month visit.
1,010 studies on the registry are indexed under Aortic Valve Stenosis; 285 are open to participants now.
This study's planned enrollment of 250 is above the median of 120 across 540 interventional studies indexed under Aortic Valve Stenosis.
Browse Aortic Valve Stenosis studies →Yonsei University is the lead sponsor of 1,417 studies on the registry; 240 are open to participants now.
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Exclusion criteria:
Participants undergo TAVI with an Edwards SAPIEN-family balloon-expandable valve. After successful initial valve implantation and randomization, one additional balloon inflation is performed using the same delivery balloon and the same inflation volume used for initial deployment. The additional inflation is performed immediately after confirming appropriate valve position and procedural stability.
Procedure: Double-Tap Balloon Post-dilatation
Participants undergo standard TAVI with an Edwards SAPIEN-family balloon-expandable valve deployed using a single balloon inflation. After successful initial valve implantation and randomization, no planned additional balloon inflation for Double-Tap optimization is performed.
Procedure: Conventional Single-Inflation TAVI
Following successful implantation of an Edwards SAPIEN-family balloon-expandable transcatheter heart valve, one additional balloon inflation is performed using the same delivery balloon and the same inflation volume used for initial valve deployment. Balloon inflation volume is not increased for the Double-Tap inflation. The procedure is performed after randomization and confirmation of appropriate valve position and procedural stability.
An Edwards SAPIEN-family balloon-expandable transcatheter heart valve is implanted using a single balloon inflation according to standard practice and the manufacturer's instructions for use. No planned additional balloon inflation for Double-Tap optimization is performed after randomization.
Percentage valve expansion measured by fluoroscopy
Expansion of the implanted transcatheter heart valve, expressed as a percentage of the manufacturer's nominal cross-sectional area for the implanted valve size. Valve diameters are measured at the inflow, midframe, and outflow levels in three-cusp and cusp-overlap fluoroscopic views. At each level, the diameters from the two views are averaged, and the cross-sectional area is calculated using the circular area formula. Fluoroscopic images are evaluated by independent imaging core laboratory assessors blinded to treatment assignment and clinical outcomes.
Time frame: immediately after TAVI procedure
No study locations are listed for this record.
Plan to share: No
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.
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