Case of eleven years old girl is reported. Girl had fixed pulmonal hypertension due to congenital heart disease of type "single ventricle" functionally. This is one of rare but complex defects. Both ventricles were connected with one big septum (which can be proved just in region of ventricular inlet), enlarged right ventricle, big vessels in position "double outlet right ventricle" without pulmonic stenosis. Diagnosis was established on time, but due to war girl wasn't transported to cardiosurgery center to perform pulmonic artery banding. Irreversibile pulmonic hypertension was developed and disease was claimed inoperabile. With this clear finding, therapeutically missed we gave up from heart catheterisation (procedure of high risk in this situation).