LMNA and familial dilated cardiomyopathy: Recently, we showed that elevated high-sensitivity cardiac troponin T (hs-cTnT) serum concentration is the earliest cardiomyopathy indicator in a cohort of DCM-causing lamin A/C gene (LMNA) mutation carriers [17], preceding arrhythmias, conduction defects and left ventricular systolic dysfunction (LVSD).