MedTrace Logo

The Effects of Ambrisentan on Exercise Capacity in Fontan Patients

NCT01971580 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 28

Last updated 2018-05-07

Study results available
· View outcomes & findings →

Summary

Hypothesis:

Patients with a Fontan type palliation are limited by preload, or the rate at which blood returns to the heart after passively traversing the pulmonary capillary bed. By decreasing pulmonary vascular resistance using an endothelin receptor antagonist, both ventricular filling pressures and volumes will increase with a simultaneous decrease in systemic impedance to flow and decrease in central venous pressures, leading to an improved capacity to increase cardiac output, and thereby an improvement in patient functional status.

Patients who are candidates for the study will be randomized to a double-blind single crossover study. Therapy with either ambrisentan or placebo will be continued for 12 weeks, with a 2 week washout period between treatment periods. Subjects will be subjected to a VO2 max test to evaluate exercise capacity at enrolment, and on the last day of each treatment period. As a component of the VO2 max testing the patient's VE, VCO2, VE/VCO2 slope, ventilatory anaerobic threshold (VAT), peak work, efficiency, and other physiologic parameters as typically obtained from cardiopulmonary testing will be assessed. In addition, each patient will be asked to complete an SF-36 quality of life questionnaire at enrollment, and on the last day of each study period.

Conditions

  • Single Ventricle Fontan Palliation

Interventions

DRUG

Ambrisentan

Sponsors & Collaborators

  • Washington University School of Medicine

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
50 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2012-08-31
Primary Completion
2015-05-31
Completion
2015-05-31

Countries

  • United States

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01971580 on ClinicalTrials.gov