Combination Therapy With Oral Sildenafil and Beraprost for Pulmonary Arterial Hypertension Associated With CREST Syndrome
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Pulmonary arterial hypertension (PAH) is commonly associated with CREST (Calcinosis, Raynaud phenomenon, Esophageal motility disorders, Sclerodactyly, and Telangiectasia) syndrome. Sildenafil, an oral phosphodiesterase type-5 inhibitor, may offer benefits in the pharmacological management of PAH. However, little is known about the long-term hemodynamic effects of sildenafil, and the potential role of sildenafil in long-term combination with beraprost, an oral prostacyclin analogue, remains unclear. We therefore examined the hemodynamic effect of oral sildenafil alone and when coadministered with beraprost in a patient with PAH associated with CREST syndrome. Traces of the acute hemodynamic effects of beraprost (20 μg) disappeared after 2 hours. In contrast, the acute hemodynamic effects of sildenafil (50 mg) produced a greater reduction in PAP (31%) and PVR (40%), and these effects also disappeared after 5 hours. After 1 month of combination therapy of sildenafil (25 mg) twice daily and beraprost (20 μg) 3 times daily, the fall in pulmonary artery pressure and pulmonary vascular resistance was sustained (31% in both). Furthermore, the patient had significantly improved her 3-minute walk test and NYHA function class without significant adverse effects at the reported doses. The findings indicate that oral sildenafil is a potent pulmonary vasodilator that appears to act synergistically with oral beraprost to cause sustained pulmonary vasodilatation in a patient with PAH associated with CREST syndrome.
- International Heart Journal刊行会の論文
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- Combination Therapy With Oral Sildenafil and Beraprost for Pulmonary Arterial Hypertension Associated With CREST Syndrome