Exploratory Study of Danicamtiv in Patients With Primary Dilated Cardiomyopathy (DCM) Due to Genetic Variants or Other Causalities

Open to people ages 18-80

• For MYH7 and TTN cohorts, must have diagnosis of primary DCM (dilated cardiomyopathy), clinically stable and due to probably disease-causing variant of MYH7 or TTN
• Has adequate acoustic windows for echocardiography
• Maximum of 3 family members with same variant can be enrolled
• For the cohort of primary DCM due to causalities other than MYH7 and TTN, participant must have diagnosis of primary DCM with a cause not related to MYH7 or TTN variants

• Significant structural cardiac abnormalities including valvar dysfunction on Screening transthoracic echo(s)
• Routinely scheduled outpatient intravenous (IV) infusions for heart failure (e.g., inotropes, afterload reduction, or diuretics)
• Presence of protocol specified laboratory abnormalities at Screening
• Recent acute coronary syndrome or angina pectoris (<90 days)
• Recent hospitalization for heart failure (<90 days)