Pulmonary Hypertension Clinical Trial
Official title:
Pulmonary Hypertension and the Hypoxic Response in SCD
The study will look at the risk factors for pulmonary hypertension (high blood pressure in
the lungs) in children and adolescents with sickle cell anemia (SCA) and examine the role of
hypoxia (oxygen shortage) in the disease. In patients with SCA, red blood cells become
sickle-shaped and tend to form clumps that get stuck in blood vessels, blocking blood flow to
the limbs and organs. Blocked blood vessels can cause pain, serious infections, and organ
damage. Many patients with SCA also develop pulmonary hypertension.
Children and adolescents with SCA or Chuvash polycythemia (another blood disorder that
carries an increased risk for pulmonary hypertension) may be eligible for this study.
Participants undergo the following procedures at the beginning (baseline) and end of the
study:
- History, physical examination and blood tests .
- Echocardiography (ultrasound study of heart function).
- Transcranial doppler (brain ultrasound study to measure brain blood flow).
- Lung function tests.
- 6-minute walk (measure of the distance covered in 6 minutes of walking).
In addition, patients are followed by telephone or by clinic visits every 6 months for a
review of their medical history and medications. A physical examination is also done at 12
months.
The research is designed to determine the prevalence and risk factors of pulmonary hypertension (PHT) in children and adolescents with sickle cell disease (SCD), and to determine the role of the hypoxic response in its pathogenesis. In this regard, proliferative vascular responses mediated by (i) hypoxia inducible factor (HIF)-regulated pathways and (ii) nitric oxide (NO)-scavenging will be compared between patients with SCD and patients with Chuvash polycythemia (CP), another hematological disorder characterized by increased risk for PHT. High throughput microarray and genotyping technologies will be employed to identify candidate gene pholymorphisms involved in pathologic responses to hypoxia in SCD and CP patients with and without PHT. ;
| Status | Clinical Trial | Phase | |
|---|---|---|---|
| Withdrawn |
NCT01950585 -
Hydroxyurea in Pulmonary Arterial Hypertension
|
Early Phase 1 | |
| Completed |
NCT00527163 -
Role of Nitric Oxide in Malaria
|
||
| Completed |
NCT03649932 -
Enteral L Citrulline Supplementation in Preterm Infants - Safety, Efficacy and Dosing
|
Phase 1 | |
| Recruiting |
NCT04554160 -
Arrhythmias in Pulmonary Hypertension Assessed by Continuous Long-term Cardiac Monitoring
|
||
| Enrolling by invitation |
NCT03683186 -
A Study Evaluating the Long-Term Efficacy and Safety of Ralinepag in Subjects With PAH Via an Open-Label Extension
|
Phase 3 | |
| Completed |
NCT01894035 -
Non-interventional Multi-center Study on Patients Under Routine Treatment of Pulmonary Arterial Hypertension (PAH) With Inhaled Iloprost Using I-Neb as a Device for Inhalation
|
||
| Not yet recruiting |
NCT04083729 -
Persistent Pulmonary Hypertension After Percutaneous Mitral Commissurotomy
|
N/A | |
| Completed |
NCT02216279 -
Phase-II Study of the Use of PulmoBind for Molecular Imaging of Pulmonary Hypertension
|
Phase 2 | |
| Terminated |
NCT02246348 -
Evaluating Lung Doppler Signals in Patients With Systemic Sclerosis (SSc)
|
N/A | |
| Terminated |
NCT02243111 -
Detecting Pulmonary Arterial Hypertension (PAH) in Patients With Systemic Sclerosis (SSc) by Ultrasound
|
N/A | |
| Completed |
NCT02821156 -
Study on the Use of Inhaled NO (iNO)
|
N/A | |
| Recruiting |
NCT01913847 -
Safety and Efficacy Study of HGP1207 in Patients With Pulmonary Hypertension
|
Phase 3 | |
| Completed |
NCT06240871 -
Contrast Enhanced PA Pressure Measurements
|
||
| Completed |
NCT01615484 -
Ex-vivo Perfusion and Ventilation of Lungs Recovered From Non-Heart-Beating Donors to Assess Transplant Suitability
|
N/A | |
| Completed |
NCT02377934 -
Evaluation of Radiation Induced Pulmonary Hypertension Using MRI in Stage III NSCLC Patients Treated With Chemoradiotherapy. A Pilot Study
|
||
| Recruiting |
NCT01091012 -
Effectiveness of the Vasodilator Test With Revatio, Made in Patients With Acute Pulmonary Hypertension
|
Phase 3 | |
| Completed |
NCT01484899 -
Smoking: a Risk Factor for Pulmonary Arterial Hypertension?
|
N/A | |
| Completed |
NCT00739375 -
The Effect of Blood Flow in the Maturing Arteriovenous Access for Hemodialysis on the Development of Pulmonary Hypertension.
|
Phase 1 | |
| Completed |
NCT01463514 -
Noninvasive Determination of Cerebral Tissue Oxygenation in Pulmonary Hypertension
|
N/A | |
| Completed |
NCT02275793 -
The Regulation of Pulmonary Vascular Resistance in Patients With Heart Failure
|