Try the modernized beta website. Learn more about the modernization effort.
Working… Menu

Effects of Tracleer (Bosentan) on Pulmonary Arterial Hypertension Related to Eisenmenger Physiology

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00317486
Recruitment Status : Completed
First Posted : April 25, 2006
Last Update Posted : February 15, 2010
Information provided by:

Brief Summary:
This study evaluates the effects of bosentan on oxygen saturation, hemodynamics and exercise capacity in patients with pulmonary arterial hypertension related to Eisenmenger physiology. Patients receive bosentan or placebo for 16 weeks.

Condition or disease Intervention/treatment Phase
Pulmonary Arterial Hypertension Related to Eisenmenger Physiology Drug: bosentan Phase 4

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 54 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Multi-center, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Effects of Tracleer (Bosentan) on Oxygen Saturation and Cardiac Hemodynamics in Patients With Pulmonary Arterial Hypertension Related to Eisenmenger Physiology
Study Start Date : September 2003
Actual Primary Completion Date : April 2005
Actual Study Completion Date : April 2005

Primary Outcome Measures :
  1. Change from baseline to Week 16 in oxygen saturation at rest with room air
  2. Change from baseline to Week 16 in indexed pulmonary vascular resistance

Secondary Outcome Measures :
  1. Changes from baseline to Week 16 in cardiac hemodynamics

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   12 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Male or female patients at least 12 years with a body weight at least 40 kg (inclusive) and with a functional class III (1998 WHO classification).
  2. Patients with pulmonary arterial hypertension related to Eisenmenger physiology echocardiographically established as atrial septal defect at least 2 cm effective diameter and/or ventricular septal defect at least 1 cm effective diameter; PAH confirmed via cardiac catheterization: mean pulmonary arterial pressure >25 mm Hg, pulmonary capillary wedge pressure <15 mm Hg and pulmonary vascular resistance >3 mm Hg/l/min.
  3. Patients with documented oxygen saturation up to 90%, and >70% (at rest, with room air).
  4. Patients able to perform a 6-minute walk test at least 150 m, and up to 450 m.
  5. Patients stable for at least 3 months prior to screening.
  6. Bosentan naïve patients.
  7. Female patients who are surgically sterile, postmenopausal or have documented infertility.
  8. Female patients of childbearing potential using one of the following methods of contraception: Barrier-type devices (e.g., condom, diaphragm) used ONLY in combination with a spermicide. A double-barrier method is recommended; intrauterine devices (IUDs); oral or implanted contraceptives, if used in combination with a barrier method.
  9. Patients providing written informed consent.

Exclusion Criteria:

  1. Pregnant patients, nursing mothers.
  2. Patients with left ventricular dysfunction (ejection fraction <40%).
  3. Patients with restrictive lung disease (TLC<70% predicted); obstructive lung disease (FEV1<70% predicted, with FEV1/FVC<60%)
  4. Patients with systolic blood pressure < 85 mm Hg.
  5. Patients with other conditions that may affect the ability to perform a 6-minute walk test.
  6. Patients unable to provide informed consent and comply with the patient protocol.
  7. Patients with known coronary arterial disease.
  8. Patients with serum creatinine >125 µM/l.
  9. Patients with iron deficiency (serum ferritin <10 ng/ml) unless corrected by iron supplement.
  10. Patients with hemoglobin or hematocrit that is more than 30% below the normal range (patients with secondary polycythemia are permitted).
  11. Patients with AST and/or ALT values greater than 3 times the upper limit of normal.
  12. Patients who have started or stopped treatment for PAH within one month of screening, excluding anticoagulation.
  13. Patients who are receiving glyburide (glibenclamide), cyclosporine A or tacrolimus at inclusion or are expected to receive any of these drugs during the study.
  14. Patients who are receiving vasodilators including, but not limited to epoprostenol or prostacyclin analogues, or are expected to receive any of these drugs during the study.
  15. Patients active on organ transplant lists.
  16. Patients taking phosphodiesterase inhibitors or endothelin receptor antagonists (other than bosentan) or any other investigational drugs/devices.
  17. Patients with planned surgical intervention during the study period.
  18. Cardiac catheterization-specific exclusion criteria:

    1. Patients who cannot safely have catheterization performed as indicated.
    2. Patients in whom shunting is not at the atrial or ventricular level.
    3. Patients with nonequal pulmonary venous desaturation that theoretically cannot be corrected with administration of 100% non-rebreather-supplied oxygen.
    4. Patients with nonpulsatile pulmonary blood flow, or with multiple sources of pulmonary blood flow.
    5. Patients with discontinuous pulmonary arteries, peripheral pulmonary arterial or venous stenosis > 25% size of native PA or creating unequal bilateral PA mean pressures, PA band with gradient > 20 mm Hg, tetralogy of fallot/pulmonary atresia, VSD/pulmonary atresia, DORV/pulmonary atresia, truncus arteriosus, scimitar syndrome.
    6. Patients where SVC sampling cannot be performed, or where SVC sampling may be contaminated
    7. Patients with ductus arteriosus.
    8. Patients with mitral or pulmonary venous stenosis, intracavitary LV outflow obstruction, sub, valvar or supravalvar aortic stenosis or aortic coarctation.
    9. Patients with <10 indexed Wood units, greater than moderate mitral regurgitation, mean pulmonary venous pressure > 16 mm Hg, pulmonary venous "v" waves > 20 mm Hg, systemic ventricular end-diastolic pressure > 16 mm Hg; patients with recognized extracardiac systemic venous collaterals to the pulmonary venous circulation, patients with recognized hepatic wedge pressure-inferior vena cava pressure gradient > 12 mm Hg.
    10. Patients (during catheterization) with uncorrectable hypercarbia with pCO2 >55 mm Hg; patients with uncorrectable acidemia with pH <7.34; patients in active pain or distress; unconscious or mechanically ventilated patients; patients with unstable systemic or pulmonary blood flow; systemic arterial or pulmonary artery pressures or hematocrit (change of > 25% during catheterization); unstable cardiac rhythm dissimilar to baseline cardiac rhythm during physical examination assessments for the entire duration of the catheterization excepting nonsustained arrhythmia; patients with documented or recognized air embolism, hemorrhage, cardiac, cerebral or peripheral organ ischemia occurring during or immediately preceding the catheterization.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00317486

Show Show 17 study locations
Sponsors and Collaborators
Layout table for additonal information Identifier: NCT00317486    
Other Study ID Numbers: AC-052-405
First Posted: April 25, 2006    Key Record Dates
Last Update Posted: February 15, 2010
Last Verified: February 2010
Keywords provided by Actelion:
pulmonary arterial hypertension
Eisenmenger physiology
Additional relevant MeSH terms:
Layout table for MeSH terms
Pulmonary Arterial Hypertension
Familial Primary Pulmonary Hypertension
Eisenmenger Complex
Vascular Diseases
Cardiovascular Diseases
Hypertension, Pulmonary
Lung Diseases
Respiratory Tract Diseases
Heart Defects, Congenital
Cardiovascular Abnormalities
Heart Diseases
Congenital Abnormalities
Antihypertensive Agents
Endothelin Receptor Antagonists
Molecular Mechanisms of Pharmacological Action