Comparison Between Heart Failure Without Left Ventricular Systolic Dysfunction and Progression to End-Stage in Hypertrophic Cardiomyopathy.

In HCM with LVEF ≥50%, HF hospitalization without LVSD was more frequently observed than development of LVSD or SCD during mid-term follow-up. The overlap between HF without LVSD and developing LVSD was small (19.4%), and these 2 HF events had different predictors.