From Reverse Remodeling to Adaptive Coupling: Rethinking Post‐ASD Closure Dynamics

We read with great interest the study by Khajali et al. [1], who demonstrated consistent right-heart reverse remodeling and pulmonary pressure reduction within 6 months following transcatheter atrial septal defect (ASD) closure. Their prospective echocardiographic analysis provides valuable short-term confirmation of structural recovery and procedural safety. We wish, however, to expand on three interpretive aspects that may refine the understanding of post-closure cardiac adaptation. While the authors reported that remodeling magnitude was independent of defect diameter, the role of bi-atrial adaptive coupling deserves further attention. Recent longitudinal strain analyses indicate that left-atrial reservoir strain, even without volumetric change, can correlate with right-ventricular systolic recovery after closure [2]. This finding supports a model of early cross-chamber interdependence, where mechanical restoration extends beyond geometric correction. The observation that tricuspid annular plane systolic excursion remained unchanged despite improved right-ventricular ejection fraction highlights the distinct load sensitivity of these indices. Advanced metrics such as three-dimensional strain or myocardial work index could help determine whether recovery reflects true contractile improvement or passive unloading [3]. The stable cardiac rhythm profile at 6 months should not imply complete electrophysiologic normalization. Subclinical atrial conduction abnormalities may persist beyond early follow-up, as shown in late P-wave dispersion and conduction time analyses [4]. Extending rhythm monitoring could help distinguish structural reversal from latent electrical remodeling. Beyond these mechanistic insights, a translational dimension is emerging. Evidence suggests that restoring coordinated atrial–ventricular coupling after ASD closure predicts normalization of diastolic strain rate and a reduced risk of late atrial arrhythmias [5]. Integrating such coupling metrics into post-closure evaluation could transform echocardiographic surveillance from descriptive follow-up to predictive, risk-guided assessment. From a clinical perspective, quantifying atrial–ventricular coupling recovery may guide individualized follow-up intervals or identify patients at risk for persistent diastolic dysfunction. Such integration could shift ASD surveillance from structural confirmation to dynamic, outcome-oriented monitoring, aligning physiologic insights with real-world management strategies. In summary, Khajali et al. [1] provide pivotal evidence of short-term remodeling. Building on their findings, future multicenter studies integrating deformation imaging, electrophysiologic markers, and patient-specific modeling could clarify the continuum from mechanical correction to physiological normalization. AI Declaration: The authors used ChatGPT (OpenAI, San Francisco, CA, USA) solely for language editing and grammar checking under author supervision. The authors have nothing to report. The authors have nothing to report. The authors declare no conflicts of interest. The authors have nothing to report.