View clinical trials related to Pulmonary Arterial Hypertension.
Filter by:The purpose of this study is to evaluate the role of stress echocardiography, compared to standard echocardiography in the early identification of pulmonary arterial hypertension in systemic sclerosis. To evaluate the role of BNP in this setting.To analyze data recorded with respect to the parameters commonly used for SSc evaluation (eg thorax HRCT, pulmonary function tests + DLCO, nailfold capillaroscopy, etc); these parameters are available starting for 1999.
To evaluate the change from baseline in pulmonary vascular resistance (PVR), and other hemodynamic parameters, following the addition of ambrisentan to background phosphodiesterase type-5 inhibitor (PDE-5i) therapy in subjects with pulmonary arterial hypertension (PAH) who have demonstrated a sub-optimal response to PDE-5i monotherapy. The study was originally designed as a 2-arm, double-blind, randomized study in which patients received ambrisentan or placebo for 24 weeks, and then received ambrisentan blinded to dose for 24 weeks. With Protocol Amendment 2 (12 June, 2009), the study was switched to single-arm, open-label treatment, and all patients remaining in the placebo arm were switched to open-label ambrisentan treatment. Patients who enrolled after Amendment 2 all received open-label ambrisentan.
The early detection of pulmonary arterial hypertension may help to improve prognosis of the disease. It is assumed that in the early stages of pulmonary arterial hypertension, pulmonary arterial pressure values may be normal at rest, but the remodelling of small arteries leads to stiffening resulting in increased pulmonary arterial pressure during exercise. In the present study we investigate patients with risk factors for pulmonary arterial hypertension (e.g. connective tissue disease) by combining exercise tricuspid echo doppler and cardiopulmonary exercise test to screen patients for exercise-induced pulmonary hypertension and control the results by the gold standard right heart catheterisation at rest and during exercise. We expect that using this screening method, patients with pulmonary arterial hypertension would be recognized earlier.
Our goal is to determine clinically in Pulmonary Arterial Hypertension patients if associations exist between the efficacy and toxicity of sitaxsentan, bosentan, and ambrisentan and several gene polymorphisms in several key disease-specific and therapy specific genes. Also characterized is the relationship between these polymorphisms and the severity of Pulmonary Arterial Hypertension using either baseline hemodynamic or clinical surrogates for disease severity. Hypothesis: Polymorphisms influence the efficacy and toxicity of specific Pulmonary Arterial Hypertension therapy as well as development/severity of PAH via their effect on PA remodeling, drug response, or metabolism. This study requires a one time 8.5 ml blood sample and clinical data to be obtained at initiation of therapy, 4 months after initiation of therapy and 12 months after initiation of therapy.
Patients with advanced sarcoidosis often develop pulmonary hypertension. Pulmonary hypertension is a condition where the right side of the heart has to push the blood though the lungs at a higher pressure than normal. Since this pressure is higher, it is harder for the heart to pump the blood through the lungs to the left side of the body. If the blood can not get through the lungs, it can not get pumped through the rest of the body. This leads to weakness and shortness of breath. This type of hypertension does not usually respond to regular blood pressure medicines. The purpose of this study is to determine if bosentan (Tracleer) will help sarcoidosis associated pulmonary hypertension.
AMB-320/321-E was designed to provide long-term, controlled monitoring of pulmonary arterial hypertension (PAH) patients treated with ambrisentan (AMB) in order to properly define the adverse event profile associated with this endothelin receptor antagonist (ERA), including the incidence and severity of elevated serum liver function tests (LFTs). In addition, this study continued the efficacy assessments of the previous studies, examined long-term AMB treatment success, and compared long-term survival of subjects treated with AMB to the NIH registry of patients with PAH.
The investigators hypothesize that baseline plasma brain natriuretic peptide (BNP) and migration inhibitory factor (MIF) levels are surrogate markers of clinical severity of PAH and that changes in plasma brain natriuretic peptide (BNP) and MIF levels pre and post exercise.
The primary objective of this study is to evaluate the safety of long-term administration of GSK1325760A in patients with PAH. The secondary objectives of this study are to evaluate long-term administration of GSK1325760A on: - Improvement in exercise capacity (six-minutes walk distance: 6MWD), change in WHO Functional Classification and time to clinical worsening of PAH - Change in the Borg Dyspnea Index (assessed immediately following the six-minute walk test [6MWT]) - Change in plasma brain natriuretic peptide (BNP) levels - Cardiopulmonary hemodynamics parameters (as measured by echocardiography)
Patients suffering from pulmonary arterial hypertension (PAH) frequently remain symptomatic despite medical therapy. Symptoms include breathlessness, poor exercise capacity and reduced quality of life. In many other serious heart or lung diseases it has been shown that physical rehabilitation improves patient's fitness and quality of life. In PAH there are no clear guidelines and in general physical activity has traditionally been discouraged, although evidence for this advice is lacking. Interesting research project in Germany showed significant benefit for in-patient rehabilitation in PAH patients. In this study we will perform a controlled clinical study of out-patient rehabilitation of patients with PAH. We hypothesize that physical training of patients will result in increased exercise capacity and improved quality of life.
Multi-center, double-blind, placebo-controlled, randomized, parallel study comparing continuous intravenous (IV) Remodulin® to placebo in patients with pulmonary arterial hypertension either primary (PPH) or associated with human immunodeficiency virus (HIV) infection or collagen vascular disease).