- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00277940
Aortic Arch Reconstruction
Neoaortic Elastic Properties After Aortic Arch Reconstruction
Study Overview
Status
Conditions
Detailed Description
In the present study we proposed to examine neo-aortic properties in a cohort of children with single ventricle heart defects who have undergone the bi-directional Glenn procedure (with or without Norwood palliation) and compare them to a cohort of patients with single ventricle who have had no aortic arch interventions. Patients in both groups typically undergo the Fontan operation between 18-48 months of age. After arrival to the operating suite and the placement of routine instrumentation, a transesophageal echocardiography (TEE) is routinely obtained. All data needed for this protocol is obtained during this TEE.
The stiffness of the aorta will be determined by calculating the pressure-strain elastic modulus (Ep) and the stiffness index beta (β). They are calculated from the formula Ep=[Ps-Pd]/[Ds-Dd/Dd] and β = [ln Ps/Pd[Ds-Dd]. Pressure-strain elastic modulus measurements have been utilized to measure the stiffness of the aorta and carotid arteries in both adults and children with a high reproducibility and low interobserver variability. The stiffness index beta has been proposed as a better measure of aortic stiffness because of its independence from measured blood pressure. The ability of a vessel to distend to store extra volume due to pressure effects is known as its compliance. A vessel with a higher compliance will be more "stretchy" and will therefore be more favorable to holding a greater volume of blood rather than storing a lot of pressure energy. Conversely, a vessel with a lower compliance will be less "stretchy" and therefore be more favorable to storing a lot of pressure energy rather than holding a greater volume of blood. Essentially, if two vessels are of equal size (cross-sectional flow area and volume), but one vessel has a lower compliance, then a 1 milliliter change in volume of the lower compliance (less stretchy) vessel will result in a greater pressure increase than a 1 milliliter change in volume of the higher compliance (more stretchy) vessel. Compliance will be assessed by the use of automatic border detection. This provides a continuous measure of the vessel cross-sectional area over time. Compliance is calculated by (Areamax-Areamean/mean blood pressure).
Blood pressure data will be recorded simultaneously with an arterial catheter that is used routinely during the operation.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Georgia
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Atlanta, Georgia, United States, 30322
- Children's Healthcare of Atlanta
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Single ventricle congenital heart disease 1) palliated with bi-directional Glenn procedure after having the Norwood procedure (experimental group) or 2) palliated with the bi-directional Glenn without having the Norwood procedure as stage I palliation-i.e. Tricuspid Atresia, Pulmonary Atresia (control group)
Undergoing routine Fontan procedure
Exclusion Criteria:
- Semi-lunar valve insufficiency > trivial
Residual coarctation noted on routine pre-Fontan catheterization
Those who do not meet inclusion criteria
Study Plan
How is the study designed?
Design Details
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: William T Mahle, MD, Children's Healthcare of Atlanta
Study record dates
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 03-042 (Fox Chase Cancer Center)
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