- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT00277901
MRI Assessment of RV Function: Patients With TOF or Aortic Coarctation
MRI Assessment of Two Congenital Heart Disease States: Assessment of Right Ventricular Function: Predictor of Optimal Timing of Pulmonary Valve Replacement in Patients With TOF; Assessment of Flow Dynamics in Patients With Aortic Coarctation
Descripción general del estudio
Estado
Condiciones
Descripción detallada
Patients with Tetralogy of Fallot have various degrees and levels of right ventricular outflow tract obstruction. They undergo surgical removal of the obstructing structures, which includes the pulmonary valve. The repair of the outflow tract is done utilizing a transannular patch. This approach, which is considered the standard of care, results in free pulmonary insufficiency, which may become severe and lead to right heart overloading and subsequent dilatation and dysfunction. This chronic overloading results in progressive tricuspid insufficiency and a suspected decline in effective pulmonary blood flow, cardiac output and right ventricle functional capabilities. Many patients develop progressive exercise intolerance, arrhythmias and severe cardiomegaly leading to dilated cardiomyopathy. The progressive decline in patient clinical status results in recommendations of pulmonary valve replacement to interrupt further dysfunction of the ventricles. Clinical improvement is generally seen among the patients and cardiac function is measurably improved in many cases, however the timing of surgery remains undefined and its impact on function improvement and recovery post -valve replacement is under serious debate and continuous discussion.
Preliminary work suggests that Magnetic Resonance Imaging (MRI) determined right to left ventricular volume ratio's of greater than 2:1 with associated tricuspid regurgitation, right ventricular regurgitant volumes of greater than 50%, and right ventricular ejection fractions less than 45% are common among patients with severe right ventricular failure and dysfunction. These patients are in need of pulmonary valve replacement and have routinely been referred for surgical intervention.
Patients with Aortic Coarctation have a localized malformation characterized by deformity of the aortic media, causing narrowing, usually severe, of the lumen of the vessel. Surgical repair or removal of this malformation is the treatment of choice however; the use of MRI to better determine the extent of damage or malformation would allow the surgeon to plan an operative strategy prior to opening the chest.
Tipo de estudio
Inscripción (Actual)
Contactos y Ubicaciones
Ubicaciones de estudio
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Georgia
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Atlanta, Georgia, Estados Unidos, 30322
- Children's Healthcare of Atlanta
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Descripción
Inclusion Criteria:
- Patients with the diagnosis of Tetralogy of Fallot or Aortic Coarctation being Treated at Children's Healthcare of Atlanta at Egleston.
Exclusion Criteria:
- Those patients who do not meet the inclusion criteria
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
---|---|---|
(1) Determine Right and left ventricular volumes during all phases of the cardiac cycle.
Periodo de tiempo: 7 years
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(1) Determine Right and left ventricular volumes during all phases of the cardiac cycle.
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7 years
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: James Parks, MD, Children's Healthcare of Atlanta, Sibley Heart Center Cardiology
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 02-122
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