Dive Brief:
Cytokinetics said Tuesday that its drug Myqorzo succeeded in a Phase 3 trial in people with a progressive heart condition, opening up a sizable market opportunity and separating the treatment from a rival therapy marketed by Bristol Myers Squibb.
According to Cytokinetics, Myqorzo met the dual main goals of a study in people with the “non-obstructive” form of hypertrophic cardiomyopathy, or HCM. When compared to a placebo, people receiving Myqorzo had a statistically significant improvement in peak oxygen consumption as well as scores on an assessment of heart health after 36 weeks. The drug also hit on key secondary measures, among them a commonly used evaluation of heart symptoms.
Cytokinetics said no new safety signals were identified in the trial and that the percentage of patients completing treatment was similar between those getting Myqorzo or a placebo. Drops of over 50% in left ventricular “ejection fraction”— or the amount of blood pumped into the arteries, a known risk of drugs like Myqorzo — occurred in 27 treatment recipients, versus one in the placebo group. That side effect was associated with two cases of heart failure and led 3% of participants to interrupt treatment.
