Impaction of Regurgitation Jet on Anterior Mitral Leaflet is Associated with Diastolic Dysfunction in Patients with Bicuspid Aortic Valve and Mild Insufficiency: a Cardiovascular Magnetic Resonance Study

Overview

Journal Int J Cardiovasc Imaging

Publisher Springer

Specialty Radiology

Date 2021 Aug 27

PMID 34448067

Citations 3

Authors

Nicola Galea

Giacomo Pambianchi

Giulia Cundari

Francesco Sturla

Livia Marchitelli

Carolina Putotto

Paolo Versacci

Ruggero De Paulis

Marco Francone

Carlo Catalano

Affiliations

Soon will be listed here.

Abstract

To assess the impact of regurgitant jet direction on left ventricular function and intraventricular hemodynamics in asymptomatic patients with bicuspid aortic valve (BAV) and mild aortic valve regurgitation (AR), using cardiac magnetic resonance (CMR) feature tracking and 4D flow imaging. Fifty BAV individuals were retrospectively selected: 15 with mild AR and posterior regurgitation jet (Group-PJ), 15 with regurgitant jet in other directions (Group-nPJ) and 20 with no regurgitation (Controls). CMR protocol included cine steady state free precession (SSFP) sequences and 4D Flow imaging covering the entire left ventricle (LV) cavity and the aortic root. Cine-SSFP images were analyzed to assess LV volumes, longitudinal and circumferential myocardial strain. Circumferential and longitudinal peak diastolic strain rate (PDSR) and peak diastolic velocity (PDV) were reduced in group PJ if compared to group nPJ and control group (PDSR = 1.10 ± 0.2 1/s vs. 1.34 ± 0.5 1/s vs. 1.53 ± 0.3 1/s, p:0.001 and 0.68 ± 0.2 1/s vs. 1.17 ± 0.2 1/s vs. 1.05 ± 0.4 1/s ; p < 0.001, PDV = - 101.6 ± 28.1 deg/s vs. - 201.4 ± 85.9 deg/s vs. - 221.6 ± 67.1 deg/s; p < 0.001 and - 28.1 ± 8 mm/s vs. - 38.9 ± 11.1 mm/s vs. - 43.6 ± 14.3 mm/s, p < 0.001, respectively), whereas no differences have been found in systolic strain values. 4D Flow images (available only in 9 patients) showed deformation of diastolic transmitral streamlines direction in group PJ compared to other groups. In BAV patients with mild AR, the posterior direction of the regurgitant jet may hamper the complete mitral valve opening, disturbing transmitral flow and slowing the LV diastolic filling.

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