Pericardial Disease

The investigators are aiming to investigate the association between ejection fraction (EF) determined by echocardiography and signals obtained from Photoplethysmography (PPG) in the general population. The investigators are also aiming to investigate the association between blood pressure and signals obtained from PPG in the general population. Finally, the investigators are also aiming to investigate the association between signals obtained from PPG in the general population to cardioechographic findings such as, valvular heart disease, structural heart diseases, cardiomyopathies, pericardial disease etc.

The main objectives of this observational study are: 1. Provide reliable data on the prevalence of pericardial diseases, pericardial effusion, constrictive pericarditis and its predisposing factors among ESRD patients, undergoing long-term dialysis. 2. Detect the predisposing factors that could contribute to pericardial effusion amount and severity. Participants (or their designated contact persons) will be contacted over the phone for either a telephone interview or a follow-up visit in the outpatient clinics, whatever feasible and possible.