Den procentvise reduktion i PVR (11, 2%) for sildenafil 20 mg var efter en 12 ugers periode proportionelt større end reduktionen i systemisk vaskulær modstand (SVR) (7, 2%).
The percent reduction at 12 weeks for sildenafil 20 mg in PVR (11.2%) was proportionally greater than the reduction in systemic vascular resistance (SVR) (7.2%).