Table 1: Clinical characteristics in both groups depending on achieving or not 4.5 METs (metabolic equivalents) in the effort test.

<4.5 METs >4.5 METs Days after surgery 59.1 ± 11.4 63.8 ± 17.3 Recipient age (years)* 56.1 ± 9.3 48.9 ± 9.7 Donor age (years) 39.4 ± 11.6 42.4 ± 11.1 Male recipients 68.2 75.7 Male donors 68.2 57.6 Donor BMI/recipient BMI 1 ± 0.17 0.99 ± 0.19 Recipient BMI 25.1 ± 3.7 24.6 ± 3.5 PCP (mmHg) 24.5 ± 10.9 23.7 ± 10.3 PVR (WU) 2.4 ± 1.8 2.3 ± 1.4 LVEF (%) 19.1 ± 11.3 18.7 ± 10.2 Creatinine (mg/dl) 1.1 ± 0.5 1.1 ± 0.4 Ischemic time (min)* 190.9 ± 45.9 151.3 ± 48.8 Ischemic time > 180 min* 68.2 30.3 Inotropic treatment# 45.5 22.7 NYHA ≥ III-IV 81.8 78.8 INTERMACS score* 3.6 ± 1.3 4.4 ± 1.3 Diabetes mellitus 27.3 15.2 Hypertension requiring treatment 31.8 27.3 Baseline heart disease (ischemic/idiopathic/hypertrophic/other)* 59/18/0/23 33.3/45.5/12.1/9.1 Smoking <1 years 36.4 27.3 Ventricular assist device* 31.8 6.1 Urgent transplant# 45.4 21.2 Moderate-severe obstructive respiratory pattern 13.7 15.5 Treated rejection episodes 31.8 27.3

Values are expressed as mean ± standard deviation or as percentages. Body mass index (BMI), pulmonary capillary pressure (PCP), pulmonary vascular resistance (PVR), left ventricular ejection fraction (LVEF), New York Heart Association (NYHA), Wood unit (WU) , .