Cardiomyopathy is the most common inherited cardiovascular disease, showing family aggregation, so it has a huge psychological and economic burden on family members. Studying the clinical characteristics of patients with cardiomyopathy is helpful for further diagnosis, treatment and management, which has important clinical and social significance.

In this study, patients hospitalized with cardiomyopathy as the primary discharge diagnosis in China are recruited prospectively after informed consent was given. The investigator will collect the baseline clinical characteristics of the patients at enrollment, including comprehensive physical examination, laboratory testing of blood and urine, electrocardiography, 24-hour Holter, echocardiography, MRI and other examinations if necessary. Data are collected with the use of case report forms (CRFs) and are entered into a web-based system. A 6 mL venous blood sample is obtained from consenting patients. Each participant is scheduled to be followed up by telephone every 12 months after admission to hospital.

Inclusion Criteria:

• Patients with primary discharge diagnosis meeting one of the following subtypes of cardiomyopathy were enrolled, including HCM, DCM, ACM, RCM, left ventricular non-compaction, cardiac amyloidosis, Fabry disease, Pompe disease, Danon disease, and PRKAG2 cardiac syndrome.

Exclusion Criteria:

• Patients who refuse to sign the informed consent or decline follow-up.

Patients hospitalized with cardiomyopathy as the primary discharge diagnosis are recruited prospectively from multiple centers in China between July 1, 2023 and June 30, 2025.