Application of cardiac magnetic resonance feature tracking (CMR-FT) for quantitative assessment of left atrial function in nonobstructive hypertrophic cardiomyopathy

The measurement of LA strain by CMR-FT is a feasible and reliable method for assessing LA function. Myocardial reservoir and conduit function of the LA decline prior to LA enlargement, and strain parameters enable early detection of LA dysfunction. The combination of LA strain parameters with ejection fraction provides added value in diagnosing LA dysfunction. LA ejection fraction (LAEF) across all phases of the LA cycle shows a strong correlation with strain parameters.