MRI has emerged as the reference technique for quantification of severity or PR. PR could be quantified by MRI using phase contrast technique or using difference between aortic of pulmonary flow.
MR also allows very accurate measurement of RV volumes and ejection fraction. This may have theapeutic implication (Ie: decision to put an homograft in patient previously operated for Fallot tetralogy) ( images are courtesy of B Gerber).
Pulmonary regurgitation in patient with tetralogy of Fallot operated
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