The above recommendations of the European Paediatric Pulmonary Vascular Disease Network relate to the grading system currently suggested by the European Society of Cardiology and the American Heart Association and are based on paediatric data only (class, LOE). The complete list of references on the above subtopic can be found in ref. 28.

COR, class of recommendation; ICU, intensive care unit; iNO, inhaled nitric oxide; LOE, level of evidence; PAP, pulmonary artery pressure; PH, pulmonary hypertension.