Time-Integrated Aortic Regurgitation Index Helps Guide Balloon Postdilation During Transcatheter Aortic Valve...

Area of Science:

• Cardiology
• Medical Imaging
• Interventional Cardiology

Background:

• Balloon postdilation (BPD) is a key strategy to minimize paravalvular regurgitation (PVR) after transcatheter aortic valve replacement (TAVR).
• Accurate guidance for BPD is crucial for optimizing TAVR outcomes.
• Current methods for assessing PVR may have limitations in guiding BPD decisions.

Purpose of the Study:

• To investigate the effectiveness of a time-integrated aortic regurgitation index (TIARI) in guiding BPD after TAVR.
• To determine if TIARI can predict the need for BPD to reduce significant PVR.
• To assess the association between TIARI and long-term survival post-TAVR.

Main Methods:

• Retrospective analysis of 157 patients undergoing TAVR with recorded post-valve deployment echocardiography, aortography, and hemodynamic data.
• Calculation of TIARI and other hemodynamic parameters offline.
• Multivariable analysis to identify predictors of BPD and mortality.

Main Results:

• 32% of patients (49/157) required BPD for significant PVR.
• Lower median TIARI was significantly associated with the need for BPD (P<0.001).
• TIARI significantly improved the prediction of BPD when added to conventional imaging (P<0.001).
• Higher TIARI post-TAVR was associated with improved survival (HR: 0.94, P=0.014).

Conclusions:

• TIARI provides incremental value in guiding BPD decisions after TAVR, beyond standard echocardiography and aortography.
• A higher residual TIARI after valve deployment is a significant predictor of better survival in TAVR patients.
• TIARI may serve as a valuable tool for optimizing procedural success and long-term outcomes in TAVR.