Telomere shortening is a hallmark of genetic cardiomyopathies

Significance We find that telomere shortening, which usually accompanies cell division in the course of aging, occurs in cardiomyocytes (CMs) of individuals with genetic hypertrophic cardiomyopathy (HCM) or dilated cardiomyopathy (DCM). HCM and DCM CMs differentiated from human-induced pluripotent stem cells (hiPSCs) also exhibit significant telomere shortening relative to healthy controls. By contrast, no telomere shortening was detected in...