Hypertrophic remodelling in cardiac regulatory myosin light chain (MYL2) founder mutation carriers.

Aims: Phenotypic heterogeneity and incomplete penetrance are common in patients with hypertrophic cardiomyopathy (HCM). We aim to improve the understanding in genotype-phenotype correlations in HCM, particularly the contribution of an MYL2 founder mutation and risk factors to left ventricular hypertrophic remodelling.

Methods And Results: We analysed 14 HCM families of whom 38 family members share the MYL2 c.