For citations:

Gorbachevsky S.V., Shmalts A.A. Diagnosis of pulmonary hypertension associated with congenital heart disease. Part 1. Definition, classification and initial examination of patients. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2021;66(5):28-37. (In Russ.) https://doi.org/10.21508/1027-4065-2021-66-5-28-37