This is an observational, drug-free, cross-sectional, single-centre study. All patients followed at our centre and suffering from congenital heart disease treated with only haemodynamic procedures haemodynamic procedures alone, as well as paediatric patients suffering from cardiomyopathy, pulmonary hypertension or arrhythmic pathology whose follow-up was still in progress at the time of the start of the pandemic (due to death or for reasonsof the patient). The structural collection of data necessary for the evaluation of targets will take place through the creation of a specific electronic archive, in which census of all patients who have undergone follow-up at our centre since 01/01/2005 at the time of study approval and still in follow-up at the time of the start of the pandemic.
Patients of all ages will be enrolled age, both paediatric and adult, followed at our centre. It is estimated to include in the study approximately 5000 patients.
