1. Pathophysiology Department, School of Medicine, Hospital de Clínicas, Universidad de la República, Montevideo, Uruguay
2. Postoperative Cardiac Critical Care Unit, Centro Cardiológico Americano, Montevideo, Uruguay
3. Area del Cor, Hospital Vall d’Hebron, Barcelona, Spain
4. Physiology Department, School of Medicine, Universitat Autonoma de Barcelona, Barcelona, Spain