Tetralogy of Fallot Clinical Trial
Official title:
Assessment of Right Ventricular Volume Using the Ventripoint Medical System in Patients With Tetralogy of Fallott Following Repair; A Comparison Study to cMRI
Assessment of Right Ventricular Volume using the VentriPoint Medical system in patients with
Tetralogy of Fallot following repair; a comparison study to cMRI.
The objective of this study is: To evaluate the accuracy of the VentriPoint Medical System
to calculate right ventricular volumes in patients with Tetralogy of Fallot following
surgical repair.
Secondary objectives are: To validate Inter and Intra observer variability at 3 clinical
sites.
The analyses will be the same for EDV and ESV. For either right ventricular volume, the
primary effectiveness measure is the % difference between VMS and cMRI results, i.e.
(VMS-cMRI)*100%/average of VMS and cMRI results. There will be two null hypotheses for the
primary analysis:
H0+: true mean % difference > 10% and H0-: true mean % difference < -10%
The observed mean % difference will be presented with 95% confidence intervals. The VMS
right ventricular volume estimates will be regarded as equivalent to cMRI estimates if both
H0+ and H0- are rejected at a 1-sided 0.025 level by a paired t test for both EDV and ESV.
Since H0+ and H0- cannot both be true, the total type I error rate for each measure is 0.025
and the overall type I error rate for both EDV and ESV is 0.05.
n/a
Observational Model: Case-Only, Time Perspective: Prospective
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