CT coronary angiography may also be performed as an alternative to coronary catheterization when SPECT/CT MPI shows perfusion deficit or CMR stress perfusion imaging shows ischemia or wall motion abnormality in a vascular distribution [25]. FDG-PET/CT Heart FDG-PET/CT can be used as the alternative method to SPECT/CT MPI for assessing viability when myocardial ischemia is suspected or to assess blood flow to the branch pulmonary arteries after the ASO. FDG-PET/CT can have confirmatory and/or incremental value to TEE and CTA in diagnosing prosthetic endocarditis after RV-PA conduit placement, particularly when anatomic imaging findings are inconclusive or equivocal. MRA Abdomen There is no relevant literature to support the use of MRA abdomen in the evaluation of TGA after arterial switch. MRA Chest MRA chest provides important information regarding extracardiac structures such as the branch pulmonary arteries, ascending aorta, and the aortic arc, and is used in conjunction with CMR for morphology and function to provide comprehensive evaluation of the cardiovascular system after treatment for TGA. MRA Neck There is no relevant literature to support the use of MRA neck in the evaluation of TGA after arterial switch. MRI Heart Function and Morphology CMR yields accurate and reproducible data regarding both LV and RV size and function, differential pulmonary blood flow, neoaortic root diameter and regurgitant blood flow, coronary artery diameter, myocardial perfusion, and myocardial fibrosis. CMR provides important information regarding myocardial performance and viability, as well as quantitative assessment of valvar function and accurate evaluation of conduits [21]. If the echocardiographic Congenital or Acquired Heart Disease assessment of ventricular parameters or the severity of valve regurgitation is in question, CMR can resolve this uncertainty [26].
Congenital or Acquired Heart Disease. CT coronary angiography may also be performed as an alternative to coronary catheterization when SPECT/CT MPI shows perfusion deficit or CMR stress perfusion imaging shows ischemia or wall motion abnormality in a vascular distribution [25]. FDG-PET/CT Heart FDG-PET/CT can be used as the alternative method to SPECT/CT MPI for assessing viability when myocardial ischemia is suspected or to assess blood flow to the branch pulmonary arteries after the ASO. FDG-PET/CT can have confirmatory and/or incremental value to TEE and CTA in diagnosing prosthetic endocarditis after RV-PA conduit placement, particularly when anatomic imaging findings are inconclusive or equivocal. MRA Abdomen There is no relevant literature to support the use of MRA abdomen in the evaluation of TGA after arterial switch. MRA Chest MRA chest provides important information regarding extracardiac structures such as the branch pulmonary arteries, ascending aorta, and the aortic arc, and is used in conjunction with CMR for morphology and function to provide comprehensive evaluation of the cardiovascular system after treatment for TGA. MRA Neck There is no relevant literature to support the use of MRA neck in the evaluation of TGA after arterial switch. MRI Heart Function and Morphology CMR yields accurate and reproducible data regarding both LV and RV size and function, differential pulmonary blood flow, neoaortic root diameter and regurgitant blood flow, coronary artery diameter, myocardial perfusion, and myocardial fibrosis. CMR provides important information regarding myocardial performance and viability, as well as quantitative assessment of valvar function and accurate evaluation of conduits [21]. If the echocardiographic Congenital or Acquired Heart Disease assessment of ventricular parameters or the severity of valve regurgitation is in question, CMR can resolve this uncertainty [26].