A study conducted by researchers at Mayo Clinic, sponsored by the National Heart, Lung, and Blood Institute, found that early Cardiac Resynchronization Therapy (CRT) may slow the progression of heart failure in patients with mild to moderately reduced left ventricular ejection fraction (LVEF) and left bundle branch block (LBBB). The findings were presented during the final day of the Heart Rhythm Society meeting, HRS 2024, being held in Boston, MA.