Table 1.

Characteristics of patients.

Age	65 ± 15
(mean ± SD, years)
Gender	20/18
(male/female, number of patients)
SAPS II	55 ± 15
(mean ± SD)
Acute respiratory distress syndrome	16 (42%)
(number of patients, %)
Atrial fibrillation	5 (13%)
(number of patients, %)
Spontaneous breathing activity	20 (53%)
(number of patients, %)
Tidal volume	6.1 ± 1.3
(mean ± SD, mL/kg of predicted body weight)
Patients receiving norepinephrine	17 (45%)
(number of patients, %)
Body temperature	37.8 ± 1.4
(mean ± SD, °C)
Type of shock
(number of patients, %)
Septic	33 (87%)
Hypovolemic	5 (13%)
Dose of norepinephrine	0.4 (0.21-0.60)
(median (interquartile range), µg/kg/min)

n = 38. SAPS, simplified acute physiology score.