Ignite Creation Date:
2025-12-25 @ 2:34 AM
Ignite Modification Date:
2025-12-26 @ 1:10 AM
Study NCT ID:
NCT00557934
Status:
COMPLETED
Last Update Posted:
2008-09-19
First Post:
2007-11-13
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
Right Ventricular Contractility Reserve Following Repair of Tetralogy of Fallot
Sponsor:
University Hospital Tuebingen
Organization:
Study Overview
Official Title:
Evaluation of Right Ventricular Contractility Reserve Function During Dobutamine Stress in Patients Following Surgical Repair of Tetralogy of Fallot
Status:
COMPLETED
Status Verified Date:
2008-09
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
TOF-Cond
Brief Summary:
Background: Residual pulmonary regurgitation following repair of tetralogy of Fallot, in particular the use of a transannular patch, has been shown to correlate with the development of right ventricular dysfunction. Optimal timing of pulmonary valve replacement, therefore, is important to preserve right ventricular function. Several recent studies suggested that a threshold of right ventricular end-diastolic volume for intervention, in order to preserve the likelihood of adequate reverse remodeling, is in the region of 150 to 200 ml/m2 body surface area. However, there is evidence that right ventricular function does not always recover following pulmonary valve replacement even if the end-diastolic volume is below this cut-off.
In addition, previous studies suggested that early dysfunction may be present before symptoms occur. However, early dysfunction is difficult to assess.
Methods: Analysis of right ventricular function by pressure-volume loops has been extensively evaluated in experimental studies and is generally considered the optimal way to quantify right ventricular function.
By recording a family of pressure-volume loops during reduction of preload, achieved by temporary balloon occlusion of the inferior caval vein, the contractility can be calculated by the slope of the endsystolic pressure-volume relation (elastance). Changes of contractility following dobutamine infusion could be noted by changes of elastance. The increase of the slope during dobutamine demonstrates the contractility reserve of the right ventricle.
Purpose: To evaluate the right ventricular contractility reserve to determine early ventricular dysfunction after repair of tetralogy of Fallot.
In addition, previous studies suggested that early dysfunction may be present before symptoms occur. However, early dysfunction is difficult to assess.
Methods: Analysis of right ventricular function by pressure-volume loops has been extensively evaluated in experimental studies and is generally considered the optimal way to quantify right ventricular function.
By recording a family of pressure-volume loops during reduction of preload, achieved by temporary balloon occlusion of the inferior caval vein, the contractility can be calculated by the slope of the endsystolic pressure-volume relation (elastance). Changes of contractility following dobutamine infusion could be noted by changes of elastance. The increase of the slope during dobutamine demonstrates the contractility reserve of the right ventricle.
Purpose: To evaluate the right ventricular contractility reserve to determine early ventricular dysfunction after repair of tetralogy of Fallot.
Detailed Description:
None
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: