Study Design and Rationale for Investigating Phosphodiesterase type 5 Inhibition for the Treatment of Pulmonary Hypertension Due to Chronic Obstructive Lung Disease: The TADA-PHiLD (TADAlafil for Pulmonary Hypertension Associated with Chronic Obstructive Lung Disease) Trial:

Pulmonary Circulation

Bradley A.Maron¹ 

关键词: clinical trial;    pulmonary hypertension;    tadalafil;    phosphodiesterase inhibitor;   

DOI  :  10.1086/674759

学科分类：医学（综合）

来源: Sage Journals

【 摘 要 】

In patients with chronic obstructive pulmonary disease (COPD), moderate or severe pulmonary hypertension (COPD-PH) is associated with increased rates of morbidity and mortality. Despite this, approaches to treatment and the efficacy of phosphodiesterase type 5 inhibition (PDE-5i) in COPD-PH are unresolved. We present the clinical rationale and study design to assess the effect of oral tadalafil on exercise capacity, cardiopulmonary hemodynamics, and clinical outcome measures in COPD-PH patients. Male and female patients 40–85 years old with GOLD stage 2 COPD or higher and pulmonary hypertension diagnosed on the basis of invasive cardiac hemodynamic assessment (mean pulmonary artery pressure [mPAP] >30 mmHg, pulmonary vascular resistance [PVR] >2.5 Wood units, and pulmonary capillary wedge pressure ≤18 mmHg at rest) will be randomized at a 1:1 ratio to receive placebo or oral PDE-5i with tadalafil (40 mg daily for 12 months). The primary end point is change from baseline in 6-minute walk distance at 12 months. The secondary end points are change from baseline in PVR and mPAP at 6 months and change from baseline in peak volume of oxygen consumption (V·o2) during exercise at 12 months. Changes in systemic blood pressure and/or oxyhemoglobin saturation (SaO2) at rest and during exercise will function as safety outcome measures. TADA-PHiLD (TADAlafil for Pulmonary Hypertension assocIated with chronic obstructive Lung Disease) is the first sufficiently powered randomized clinical trial testing the effect of PDE-5i on key clinical and drug safety outcome measures in patients with at least moderate PH due to COPD.

【 授权许可】

CC BY