The purpose of this study is to assess the effectiveness of mavacamten treatment in Chinese adults with symptomatic obstructive hypertrophic cardiomyopathy (HCM) in real-world clinical practice
Participants aged ≥ 18 years (participants enrolled retrospectively: at the time of initial mavacamten prescription), irrespective of gender.
Participants who have initiated mavacamten (for whom enrolled retrospectively) or are scheduled to initiate mavacamten (for whom enrolled prospectively) based on clinical therapeutic needs.
Has a documented diagnosis of HCM prior to enrollment, and
Peak left ventricular outflow tract (LVOT) gradient ≥ 30 mmHg at rest or with provocation in the most recent medical record within 3 months prior to enrollment as assessed by echocardiography.
Known HCM phenocopy disease (e.g., Fabry disease, amyloidosis).
Participants who are expected to undergo major cardiac surgery during the study.
Prior treatment of obstructive HCM with invasive septal reduction (surgical myectomy or percutaneous alcohol septal ablation [ASA] or septal radiofrequency ablation) within 6 months prior to enrollment (participants enrolled retrospectively: within 6 months prior to initial mavacamten prescription); participants with an unsuccessful myectomy or percutaneous ASA or septal radiofrequency ablation performed >6 months prior to enrollment (participants enrolled retrospectively: within 6 months prior to initial mavacamten prescription) may be enrolled.
Currently treated with disopyramide or ranolazine (within 14 days prior to enrollment [participants enrolled retrospectively: within 14 days prior to initial mavacamten prescription]) or participants who are expected to be taking disopyramide, ranolazine, verapamil in combination with β-receptor blockers, or diltiazem in combination with β-receptor blockers during the study.
The study population will consist of adults diagnosed with symptomatic obstructive hypertrophic cardiomyopathy that have received mavacamten treatment in China
Cohort
Other
Mavacamten
DrugAccording to the product label
Change from baseline in Valsalva left ventricular outflow tract (LVOT) gradient
Change from baseline in resting valsalva left ventricular outflow tract (LVOT) gradient
Change from baseline in New York Heart Association (NYHA) class
Number and proportion of participants with a resting/provoked left ventricular outflow tract (LVOT) gradient < 30/50 mmHg
Number and proportion of participants achieving complete response (defined as all left ventricular outflow tract (LVOT) gradients < 30 mmHg and New York Heart Association (NYHA) Class I)
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