Study Population
A total of 50 healthy individuals with ERP on the surface electrocardiography (ECG) and 50 healthy individuals without ERP who admitted to our cardiology department to get a health report for participating in competitive sports was aged ≥18 years and had no cardiovascular risk factors such as hypertension, hyperlipidemia and diabetes mellitus were included in this study. Written informed consent was obtained from all participants and the study was approved by the local Ethics committee of our institution. The study was conducted in full accordance with the Declaration of Helsinki.