This observational study aims to manage children with cardiomyopathy in the long term. It collects baseline data, laboratory test data, and medical imaging data during the hospitalization and follow-up.

During their disease progress, participants will undergo cardiovascular magnetic resonance, echocardiography, electrocardiography, laboratory tests, and when hospitalization and follow-up, and the baseline data will be collected in the admission. All the above examination data will be analysed to assess the clinical characteristics, current status of diagnosis and treatment, and the prognostic risk factors for children with cardiomyopathy.

Inclusion Criteria:

• Pediatric patients diagnosed with cardiomyopathy.

Exclusion Criteria:

• a history of cardiovascular disease ( such as congenital heart disease, cardiomyopathy, rheumatic heart disease, valvular disease ).
• Mentally abnormal.
• Poor compliance.
• Heart, kidney and other important organs were seriously incomplete.

From the past to Jaunary 2034, pediatric patients diagnosed with cardiomyopathy were recruited from West China Second University Hospital.