“…Because of the above mentioned, when considering risk stratification of ACHD patients, attention should be rather focus on their comorbidity burden (i.e. Systemic arterial hypertension, cardiovascular disease, chronic obstructive pulmonary disease) and their physiological stage, often determined by anatomic and hemodynamic sequelae derived from previous surgeries and interventions (i. e. overt heart failure, pulmonary hypertension, arrhythmia) [ 13 , 21 ].…”