Adaptation of Alveolar-capillary Diffusion at Effort of Subjects Suffering From Complex Congenital Heart Disease

"Measure of double pulmonary diffusing will be done as the single-breath test: the patient will be seated and connected to device by an oral tip. Measure begins by a maximal inhalation of a gas mixture (0.28% of CO, 14% of He, 21% of O2,450 ppm of NO/N2 and 40ppm of NO).After, the patient will maintain an apnea of 4 secondes and will breathe out in oral tip until his residual capacity.~With the expired air, some parameters will be assessed:~* Alveolar volume (VA)~* Membrane ductance (Dm) and pulmonar capillary volume (values adjusted by Haemoglobin)~* Values of TLCO, TLCO/VA, TLNO, TLNO/VA Vc, Dm, Vc/VA, Dm/VA, TLNO/TLCO et Dm/Vc"