Role of the Nitric Oxide (NO) in Pre-oxygenation Before Anesthetic Induction in Patients With a Pulmonary Hypertension in Cardiac Surgery. Pilot Study of Feasibility

Before the anesthetic induction every included patient will follow these protocol: * Standard monitoring (ECG Electrocardiogram, SpO2 Pulsed oxygen saturation) * Insertion of radial arterial line and periferic IV line under local anesthesia, * Insertion of a internal jugular central line and Swan Ganz catheter under local anesthesia * Preoxygenation in 100% oxygen for 10 min * Further preoxygenation with a mixture of 100% oxygen associated with the iNO in a dose of 1,2 L / mn. * Anesthesia induction and initiation of mechanical ventilation. * Progressive decrease of iNO dose and stop of iNO administration.