The Effects of Sildenafil on Exercise Function and Capacity in Patients With Fontan Circulation

March 5, 2019 updated by: Milton S. Hershey Medical Center
The study will test the hypothesis that a single dose of sildenafil can increase the exercise capacity of pediatric patients with a Fontan Circulation.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
17

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Pennsylvania
      • Hershey, Pennsylvania, United States, 17033
        • Penn State Hershey Medical Center

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

2 years to 13 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Age 6-17 years
  • Male or female
  • Possess Fontan Circulation

Exclusion Criteria:

  • Severe heart failure (New York Heart Ass. functional class IV)
  • Evidence of Fontan pathway obstruction
  • History of exercise-induced severe arrhythmias
  • Pregnancy (known or suspected)
  • Orthopedic limitations that prevent ambulation on a treadmill
  • Use of nitroglycerin
  • Herbal medications

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: Crossover Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Sildenafil crossover to placebo
Sildenafil dosage (0.5mg/kg (max 20mg)) administered at the time of enrollment followed by a battery of exercise tests. After a washout period, the process will be repeated with treatment 2, placebo drug administered before the exercises.
Drug: Sildenafil
oral suspension, 0.5mg/kg, taken once prior to exercise stress test. Enrolled patients will be randomized to receive Sildenafil first and then crossed over to receive the opposite intervention, placebo.
Other Names:
  • Viagra
Drug: Placebo 2
Patient will receive a look-alike placebo. Enrolled patients will receive Placebo, the crossed over intervention from their initial intervention (Sildenafil).
Other Names:
  • Ora-sweet and Ora-plus (1:1 ratio).
Placebo Comparator: Placebo crossover to sidenafil
Patient will receive a look-alike placebo administered at the time of enrollment followed by a battery of exercise tests. After a washout period, the process will be repeated with treatment 2 Sildenafil dosage will be 0.5mg/kg (max 20mg) administered before the exercises.
Drug: Placebo
Patient will receive a look-alike placebo. Enrolled patients will be randomized to receive Placebo first and then crossed over to receive the opposite intervention, Sildenafil.
Other Names:
  • Ora-sweet and Ora-plus (1:1 ratio).
Drug: Sildenafil 2
oral suspension, 0.5mg/kg, taken once prior to exercise stress test. Enrolled patients will receive Sildenafil, the crossed over intervention from their initial intervention (Placebo).
Other Names:
  • Viagra

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
The Change in Exercise Capacity Measured Via Maximum Oxygen Consumed During Exercise (VO2)
Time Frame: baseline to 1 hour
A change in exercise capacity measured via maximum oxygen consumed during exercise (VO2). The measurement will be obtained from the Exercise Stress Test
baseline to 1 hour
The Change in Exercise Capacity Measured Via Exercise Time
Time Frame: baseline to 1 hour
A change in exercise capacity measured via exercise time (in minutes). The measurement will be obtained from the Exercise Stress Test
baseline to 1 hour

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
The Change in Exercise Capacity Measured Via Maximum Heart Rate
Time Frame: Baseline to 1 Hour
A change in exercise capacity measured via maximum heart rate (in beats per minute). The measurement will be obtained from the Exercise Stress Test
Baseline to 1 Hour
The Change in Exercise Capacity Measured Via Minimum Oxygen Saturation Levels.
Time Frame: Baseline to 1 Hour
A change in exercise capacity measured via minimum oxygen saturation (%). The measurement will be obtained from the Exercise Stress Test
Baseline to 1 Hour
The Change in Exercise Capacity Measured Via Metabolic Equivalents of Task (METs).
Time Frame: Baseline to 1 hour
A change in exercise capacity measured via metabolic equivalents of task (METs). The measurement will be obtained from the Exercise Stress Test. One MET is defined as 3.5 mL 02 uptake/kg per minute
Baseline to 1 hour

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Milton S. Hershey Medical Center

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Children's Miracle Network

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Devyani Chowdhury, MD, Milton S. Hershey Medical Center

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2009

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 24, 2012

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 24, 2012

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 21, 2009

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 24, 2009

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 25, 2009

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 26, 2019

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 5, 2019

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2019

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 31171

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

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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