Table 1

Hemodynamic data at baseline and during conventional ventilation and open lung ventilation

Baseline
 Conventional mechanical ventilation
 Open lung ventilation
Heart rate (beats/min)
 105 ± 5
 86 ± 5**
 94 ± 5
Mean arterial pressure (mmHg)
 93 ± 4
 104 ± 4**
 80 ± 4*,**
Right atrial pressure (mmHg)
 4.2 ± 1
 5.9 ± 1**
 8.1 ± 2**
Cardiac output (l/min)
 5.3 ± 0.3
 4.9 ± 0.3
 4.1 ± 0.3*,**
Right ventricular end-diastolic volume (ml)
 165 ± 11
 173 ± 13
 148 ± 13
Right ventricular end-systolic volume (ml)
 112 ± 10
 119 ± 11
 103 ± 11
Systolic pulmonary pressure (mmHg)
 30 ± 3
 31 ± 3
 28 ± 2
Mean pulmonary arterial pressure (mmHg)
 17 ± 3
 20 ± 2
 17 ± 2*
Pulmonary capillary wedge pressure (mmHg)
 9.3 ± 2
 12.1 ± 3
 12.5 ± 2**
Right ventricular ejection fraction (%)
 33.1 ± 1.7
 33.1 ± 1.7
 31.1 ± 1.9
Pulmonary vascular resistance (dynes/s/cm5)
 126 ± 38
 130 ± 34
 137 ± 49
Left ventricular end-diastolic volume (ml)
 66 ± 4
 61 ± 3
 56 ± 5**
Systemic vascular resistance (dynes sec cm5)
 1379 ± 120
 1693 ± 139**
 1508 ± 124
Left ventricular ejection fraction (ml)
 49.5 ± 1.6
 53.2 ± 2.1
 43.2 ± 5.6

*P < 0.05 open lung ventilation versus conventional mechanical ventilation, **P < 0.05 versus baseline.

Reis Miranda et al. Critical Care 2006 10:R86   doi:10.1186/cc4944