Losartan Therapy in Pulmonary Hypertension

August 22, 2007 updated by: Baskent University

Losartan Decreases Pulmonary Artery Pressure and Improves Exercise Capacity in Patients With Pulmonary Hypertension

In addition to being effective vasodilators, angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs) exert neurohumoral inhibitory actions, such as the inhibition of vascular remodeling and smooth muscle cell proliferation and the amelioration of endothelial dysfunction. These beneficial effects, render those agents appropriate for use in the treatment of pulmonary hypertension. However, data regarding the use of ACEIs or ARBs in the treatment of PHT are limited. In this study, efficacy of an ARB, losartan was compared with those of the calcium channel blocker, nifedipine in the treatment of pulmonary hypertension using echocardiographic, 6-minute walk test (6MWT), cardiopulmonary exercise test, and endothelin-1 levels.Losartan is as effective as nifedipine for reducing Doppler echocardiographically measured PAP and improving exercise capacity on 6MWT and CPET. However the short-term use of losartan or nifedipine had no statistically significant effect on endothelin-1 levels in patients with PHT.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Phase

  • Phase 3

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Pulmonary hypertension diagnosed by Doppler echocardiographic examination (a mean pulmonary artery pressure of > 26mmHg)

Exclusion Criteria:

  • acute infectious or inflammatory disease,
  • exacerbation of chronic obstructive pulmonary disease,
  • malignancy,
  • acute coronary syndrome in the last 4 weeks,
  • uncontrolled arrhythmia and hypertension,
  • decompensated heart failure,
  • acute pulmonary emboli,
  • thrombus in a lower extremity,
  • oxygen saturation below 85% at rest,
  • failure to cooperate with CPET

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: I, II
I: nifedipine II: losartan
Drug: nifedipine, losartan
I: nifedipine 30 mg/d II: losartan 50 mg/d
Other Names:
  • nifedipine (Adalat Crono, Bayer AG, Leverkusen, Germany)
  • losartan (Cozaar, Merck Sharp & Dohme, Wilmington, DE, USA)
Drug: losartan
II: losartan
Other Names:
  • losartan (Cozaar, Merck Sharp & Dohme, Wilmington, DE, USA) 50 mg/d

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Baskent University

Investigators

  • Principal Investigator: Serife Savas Bozbas, MD, Baskent University Faculty of Medicine, Department of Pulmonary Disease
  • Study Chair: Fusun Oner Eyuboglu, MD, Baskent University Faculty of Medicine, Department of Pulmonary Disease

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2005

Study Completion

July 1, 2005

Study Registration Dates

First Submitted

August 22, 2007

First Submitted That Met QC Criteria

August 22, 2007

First Posted (Estimate)

August 23, 2007

Study Record Updates

Last Update Posted (Estimate)

August 23, 2007

Last Update Submitted That Met QC Criteria

August 22, 2007

Last Verified

August 1, 2007

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KA04/127

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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