Assessment of prognostic LV parameters with CMR in hypertrophic cardiomyopathy: impact of the papillary muscles

Background Hypertrophic cardiomyopathy (HCM) is the most common inheritable heart disease, characterized by marked left ventricular hypertrophy in the absence of a disease that can cause hypertrophy to such extent. Both LV ejection fraction (EF) and LV mass have proven to be prognosticators in HCM. The literature is inconsistent with respect to in- or exclusion of papillary muscles (PMs) to LV-mass, which might influence volumetric results. PMs might be part of the hypertrophic process and substantially contribute to LV mass. We investigated the impact of in- and exclusion of the PMs to LV mass in the assessment of prognostic LV parameters in HCM. Methods