- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg 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
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
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.
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
-
-
Georgia
-
Atlanta, Georgia, Forenede Stater, 30322
- Children's Healthcare of Atlanta
-
-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
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
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
(1) Determine Right and left ventricular volumes during all phases of the cardiac cycle.
Tidsramme: 7 years
|
(1) Determine Right and left ventricular volumes during all phases of the cardiac cycle.
|
7 years
|
Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: James Parks, MD, Children's Healthcare of Atlanta, Sibley Heart Center Cardiology
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 02-122
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