Related Experiment Video
Updated: Feb 9, 2026

An Image Guided Transapical Mitral Valve Leaflet Puncture Model of Controlled Volume Overload from Mitral Regurgitation in the Rat
Published on: May 19, 2020
Dynamic left ventricular dyssynchrony and severe mitral regurgitation caused by exercise: should we go beyond the
Emilie Laflamme1, François Philippon1, Kim O'Connor1
1Department of Cardiology.
Abstract:
Guidelines for cardiac resynchronization therapy (CRT) have been established, but there may be a subgroup of patients not identified in these guidelines who may benefit from this therapy. We report a patient with a dynamic left ventricular dyssynchrony and severe mitral regurgitation caused by exercise successfully treated with CRT. Exercise testing should be considered in patients with left ventricular ejection fraction <35% and QRS <130 ms with severe heart failure symptoms that are unexplained by rest echocardiography evaluation in order to rule out ischemia and/or dynamic left ventricular dyssynchrony. In the presence of exercise-induced left ventricular bundle branch block, the implantation of CRT should be contemplated.
More Related Videos
08:31A Simplified Stepwise Approach to Echo Guidance during Percutaneous Mitral Valve Repair
Published on: October 16, 2021
11:50High-frequency High-resolution Echocardiography: First Evidence on Non-invasive Repeated Measure of Myocardial Strain, Contractility, and Mitral Regurgitation in the Ischemia-reperfused Murine Heart
Published on: July 9, 2010
Related Concept Videos
Mitral Regurgitation I: Introduction
Mitral Regurgitation III: Medical Management
Mitral Regurgitation IV: Nursing Management
Mitral Regurgitation II: Clinical Features and Diagnostic Tests
Aortic Regurgitation I: Introduction
Guidelines for Sketching a Curve