Association between atrial premature beat and left atrial function in hypertrophic cardiomyopathy on cardiovascular magnetic resonance myocardial tissue tracking: a reproducibility cohort study

CMR-TT is a promising approach for detecting atrial performance and physiology by quantitatively assessing LA deformation. Moreover, our findings demonstrate a clear association between lower LA εs and the occurrence of APB in patients with HCM. These results suggest that εs may serve as a potential indicator for reflecting atrial electrical instability in HCM and provide preliminary insights for further exploration of its role in clinical decision-making related to arrhythmia management in this patient population.