ECHO 2013 / Cardiac Magnetic Resonance Imaging in the Adult Congenital Patient
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Magnetic Resonance Angiography
Cine Angiography
CMR in Adult CHD
•Program Description
•CMR Technique
•Reproducibility
•Other Strengths and Limitations
•Cases
MRI as the Gold Standard
•Global LV and RV volume measurements with a 3D approach that has no geometric assumptions
–Ex vivo validation with phantoms and casts
–In vivo validation with normal hearts, x-ray contrast ventriculograms
–Both stroke volumes and flow measurements
–LV and RV mass compared to autopsy and animal hearts
QUESTION
The reproducibility of volume measurements by cardiac MR is as good for the RV as for the LV.
1.True
2.False
CMR LV Interstudy Reproducibility
Grothues Am J Cardiol 2002
•20 normals, 20 HF, 20 LVH underwent 2 CMRs and 2 2D echocardiograms
CMR LV Interstudy Reproducibility
Grothues Am J Cardiol 2002
•Coefficient of Variability calculated as the SD of the differences divided by the mean of the parameter under consideration
•Coefficient of Variability
|
CMR |
2DE |
LV EDV |
2.9% to 4.9% |
5.5% to 10.5% |
LV ESV * |
4.4% to 9.2% |
13.7% to 20.3% |
LV EF * |
2.4% to 7.3% |
8.6% to 19.4% |
LV Mass * |
2.8% to 4.8% |
11.6% to 15.7% |
CMR RV Interstudy Reproducibility
Grothues Am Heart J 2004
•Same 60 subjects, age 51 + 18 yrs
•Coefficient of Variability
|
CMR |
RV EDV |
4.2% to 7.8% |
RV ESV |
8.1% to 18.1% |
RV EF |
4.3% to 10.4% |
RV Mass |
7.8% to 9.4% |
•Correlation values lower for RV parameters (0.77- 0.98) than LV parameters (0.94-0.99)
CMR Reproducibility of RV
Measurements
Mooij J Magn Reson Imaging 2008
CMR 4-Chamber SSFP
