 Interim Analysis of Data from Cohort 1 Demonstrate Substantial Effects of CK-274 to Reduce LVOT Gradient in Patients with Obstructive Hypertrophic Cardiomyopathy with No Dose Interruptions Due to Left Ventricular Ejection Fraction Below 50 Interim Analysis of Data from Cohort 1 Demonstrate Substantial Effects of CK-274 to Reduce LVOT Gradient in Patients with Obstructive Hypertrophic Cardiomyopathy with No Dose Interruptions Due to Left Ventricular Ejection Fraction Below 50 