Table 2.

Effect of sildenafil on pulmonary capillary wedge pressure (PCWP)

Study	PCWP at baseline, mmHg	PCWP after sildenafil, mmHg	P value	Duration
Lewis et al. 20071	14.4 ± 12.2	12.0 ± 2.0	NS	60 minutes
Lewis et al. 200710	18.0 ± 2.0	18.0 ± 2.0	NS	12 weeks
Dumitrescu et al. 20129	27.9 ± 2.3	20.6 ± 7.6	0.04	5 months
Lepore et al. 200525	25.0 ± 2.0	22.0 ± 2.0	NS	1 hour
Guazzi et al. 200426	18.5 ± 3.0	17.3 ± 2.7	NS	60 minutes
Pons et al. 201215	26.5 ± 12.4	23.3 ± 4.2	NS	5–6 months

^NoteNS: not significant.