Abstract 14323: Significance of Angio-IMR to Predict Heart Failure Post-TAVI

Abstract

Background/Introduction: The number of transcatheter aortic valve implantation (TAVI) procedures is currently increasing. However, a substantial number of patients suffer from repeated heart failure (HF) after the TAVI procedure. The association between Index of Microvascular Resistance (IMR) and HF is already known, especially in HFpEF. Purpose: The aim of this study was to assess the prognostic significance of IMR for HF after TAVI. Method and Result: 120 consecutive patients who underwent coronary angiography (CAG) before undergoing TAVI in our hospital between 2018 and 2021 were included in the analysis. Quantitative Flow Ratio (QFR) analysis was performed for each coronary artery, excluding cases undergoing PCI before or after TAVI. The angiography derived IMR was then obtained from the QFR values. Finally, 65 patients were available for IMR analysis. Of these, 12 were hospitalized or underwent medical intensification for HF exacerbations after TAVI. IMR was significantly higher in patients with HF compared without HF. (73.8 (31 to 121) vs 59.7 (26 to 153), p=0.041) No other significant differences were found in age, QFR values, EF, i-EOA on echocardiography after TAVI, STS score, and BNP values before TAVI. All patients with HF were female. Conclusion: It is suggested that angio-derived IMR values before TAVI might be a useful predictor of heart failure after TAVI.