Key result
Electromechanical wave imaging shows ~28 ms delayed LV activation in pediatric MVP vs controls.
Why the study?
Mitral valve disease carries substantial arrhythmogenic risk, but conventional echocardiography lacks sensitivity for mitral valve electromechanics to detect early alterations.
Does Electromechanical Wave Imaging (EWI) identify electromechanical alterations in pediatric patients with mitral valve disease compared to controls?
Cross-Sectional (n=21)
Does Electromechanical Wave Imaging (EWI) identify electromechanical alterations in pediatric patients with mitral valve disease compared to controls?
Absolute Event Rate: 76.04% vs 47.64%
p-value: p=0.0013
Electromechanical Wave Imaging (EWI) can noninvasively detect delayed left ventricular activation and prolonged recovery in pediatric patients with mitral valve disease, potentially aiding in early arrhythmic risk assessment.
Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“Our work has provided a new way to dive deeper into the important role that proper function of the mitral valve dictates how valve diseases affect the overall cardiac function and activation. By using EWI to both detect and visualize these changes that are otherwise invisible by current clinical modalities, we hope to confirm it could be used for early detection and risk assessment, transforming how we evaluate and improve care for those suffering from mitral valve disease, but also arrhythmias in general.”
Findings in pediatric MVP remain hypothesis-generating; leaves open whether early changes predict arrhythmia or warrant intervention.
Mitral valve (MV) disease, particularly MV prolapse (MVP) and mitral regurgitation (MR), affects 2 to 5% of the population and poses a substantial arrhythmogenic risk, with 43% of MVP patients developing arrhythmias. Although less common in children, the absence of comorbidities can uniquely isolate early electromechanical alterations that may elucidate mechanisms later contributing to arrhythmic risk and devastating effects such as sudden cardiac death. Conventional echocardiography lacks sensitivity for MV electromechanics, motivating advanced approaches. We introduce Electromechanical Wave Imaging (EWI), a high-frame-rate echocardiography modality, to map MV-complex activation and diastolic recovery in N = 21 MVP, MR, and control pediatric subjects (13.10 ± 4.51 y old, 43% male). A preclinical canine study (n = 3) established EWI’s ability to observe temporally coupled electromechanical wave propagation across the atrioventricular junction through the closed MV-following atrial and preceding ventricular activation (73.0 ms, 60 BPM). MVP patients exhibited significantly delayed left ventricular (LV) activation (76.04 ± 12.51 ms vs. 47.64 ± 2.57 ms in controls, P = 0.0013), primarily in papillary muscles. Both MVP and MR-only subjects exhibited prolonged LV recovery, with MR-only patients showing significantly longer recovery intervals (MR-only: 277.0 ± 27.61 ms, Control: 248.7 ± 10.43 ms, MVP vs. Control: MR-only vs. Control: P = 0.0395). In two arrhythmogenic MVP cases, EWI localized arrhythmic exit sites adjacent to LV papillary muscles, coinciding with regional delayed sinus activation, aligning with invasive electrophysiology. This study demonstrates that atrioventricular valve function dictates cardiac electromechanical function and establishes full-cycle EWI as a transformative tool for diagnosing MV disease electromechanical effects, assessing arrhythmic risk, guiding interventions, and advancing noninvasive cardiac imaging.
No takes yet. Share an insight, caveat, or question.
Tourni et al. (2026) conducted a cross-sectional in Pediatric mitral valve disease (mitral valve prolapse and mitral regurgitation) (n=21). Electromechanical Wave Imaging (EWI) vs. Healthy controls was evaluated on Left ventricular (LV) activation time (p=0.0013). Electromechanical Wave Imaging revealed that pediatric patients with mitral valve prolapse had significantly delayed left ventricular activation compared to controls (76.04 vs 47.64 ms, P=0.0013).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: