2.1 Patients
This study is a retrospective cohort analysis. Patients who were diagnosed with hypertrophic cardiomyopathy at the First Affiliated Hospital of Sun Yat-sen University from March 2014 to March 2019 were included . The criteria of inclusion into the study were 1) age > 18 years; 2) diagnosis of HCM according to the European Society of Cardiology (ESC) Guidelines [10]. The exclusion criteria for the study were : 1)incomplete information; 2)Lost to follow-up; 3) Left ventricular hypertrophy contributed by other disease like hypertension, aortic stenosis and congenital subaortic diaphragm, etc. All participants provided written informed. This study was consistent with the Declaration of Helsinki, and was approved by our hospital ethics committee.