Vasoplasmic syndrome in cardiac surgery is one of the major postoperative complications.This syndrome is characterized by persistent low blood pressure despite an optimization of preload and inotropism.

Inclusion Criteria:

• All patients undergoing cardiac surgery with extracorporeal circulation
• Patients covered by a social insurance system.
• Patients who have given oral consent to participate after full information

Exclusion Criteria:

• Cardiac graft.
• Preoperative ECMO / ECLS.
• Cardiac assistance.
• Minor,
• Patient deprived of liberty, or under safeguard of justice.

All consecutive cardiac surgical patients who meeet inclusion criteria with cardiopulmonary bypass