Impact of Flow on Prosthesis-Patient Mismatch Following Transcatheter and Surgical Aortic Valve Replacement.
Circulation. Cardiovascular imaging
BACKGROUND: Severe prosthesis-patient mismatch (PPM) is diagnosed by an indexed effective orifice area
METHODS: We included SAVR patients from the PARTNER 2A trial (Placement of Aortic Transcatheter Valve 2A) and TAVR patients from the PARTNER 2 S3i (Placement of Aortic Transcatheter Valve 2 S3i) registry. The primary end point was the separate analysis of all-cause death, cardiac death, and rehospitalization at 5 years. Following TAVR and SAVR, we compared the primary end points between severe versus no-severe PPM in all patients, in low flow (LF), and in normal flow. Multivariable analysis was performed to determine variables associated with the end points.
RESULTS: Nine hundred fifty-four TAVR and 726 SAVR patients with PPM and flow data were included. Severe PPM following TAVR was significantly lower compared with SAVR in all patients (9% versus 28%,
CONCLUSIONS: Severe PPM is more common following SAVR compared with TAVR. Regardless of the implanted valve size or gradient, severe PPM impacts mortality only in patients with LF following TAVR and LF and low ejection fraction following SAVR. Severe PPM in normal flow is not associated with poor outcomes. Registration: URL: https://www.clinicaltrials.gov; Unique identifiers: NCT01314313 and NCT02687035.
Abbas AE, Ternacle J, Pibarot P, Xu K, Alu M, Rogers E, Hahn RT, Leon M, Thourani VH. Impact of Flow on Prosthesis-Patient Mismatch Following Transcatheter and Surgical Aortic Valve Replacement. Circ Cardiovasc Imaging. 2021 Aug;14(8):e012364. doi: 10.1161/CIRCIMAGING.120.012364. Epub 2021 Aug 13. PMID: 34387097.