First-line Bosentan and Sildenafil Combination Therapy for Pulmonary Arterial Hypertension: A Safety and Efficacy Pilot Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 12
- 试验地点
- 1
- 主要终点
- 6 minute walk test distance
研究概览
简要总结
The purpose of this study is to evaluate the strategy of initiating double oral combination therapy with bosentan and sildenafil at the time of diagnosis of pulmonary arterial hypertension (PAH) in a preliminary way.
详细描述
Current treatment paradigms for PAH suggest adopting goals of therapy with relatively objective parameters such as 6 minute walk distance to determine when to add a second oral agent (1). This often entails observing deterioration in the patient on a single agent before instituting the second one. This strategy could be problematic, as patients may never recover the function lost due to progressive PAH (2). In addition, given the malignant nature of the clinical course of PAH in many cases and the nature of the underlying proliferative vasculopathy, some have argued that altering this paradigm to resemble that used in cancer chemotherapy may be more appropriate (3). That is, "induction" therapy at diagnosis with multiple agents followed by a maintenance phase of treatment might offer significant benefits to the patient.
This open-label pilot study is the first to investigate the potential efficacy and safety of a first-line combination strategy in consecutive patients with PAH in contrast to the "add-on" strategy for combination therapy. It will serve as the basis on which to consider larger, multicenter investigations of this strategy.
- Hoeper M, et al. Eur Respir J. 2005 Nov;26(5):858-63.
- Halpern SD, et al. Proc Am Thorac Soc. 2008 Jul 15;5(5):631-5.
- Provencher S, et al. Chest. 2005 Dec;128(6 Suppl):622S-628S.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients with symptomatic Functional Class III PAH in the following categories: Idiopathic (IPAH), Familial (FPAH), Associated with connective tissue disease, Associated with drugs or toxins
- •PAH diagnosed by right heart catheterization, defined as: mean pulmonary arterial pressure (mPAP) ≥ 25 mmHg, PVR > 3 mmHg/l/min (Wood units) or > 240 dyn sec cm-5, pulmonary capillary wedge pressure (PCWP) ≤ 15 mmHg
- •Baseline 6 MWT distance > 150 and < 450 m
排除标准
- •Treatment with ERAs other than bosentan;
- •Treatment with PDE5 inhibitors other than sildenafil;
- •Treatment with any prostanoid;
- •PAH associated with thyroid disorders, glycogen storage disease, Gaucher disease, hereditary hemorrhagic telangiectasia, hemoglobinopathies, myeloproliferative disorders and splenectomy; valvular disease with valvular lesions to be excluded by echocardiogram within 2 years prior to randomization
- •Restrictive lung disease: total lung capacity (TLC) < 60% of normal predicted value;
- •Obstructive lung disease: forced expiratory volume/forced vital capacity (FEV1/FVC) < 50%
结局指标
主要结局
6 minute walk test distance
时间窗: 4 months
次要结局
- Echocardiographic parameters(4 months)
- 6 minute walk test distance(12 months)
- Hemodynamics(4 months)
- Quality of Life as measured by CAMPHOR questionnaire(4 months)
研究者
Naushad Hirani
Clinical Assistant Professor
University of Calgary