In this case-control study of patients with TGA vs healthy participants, TGA was associated with high-grade SJVC in the presence of small-caliber IJVs, with an approximately 70% right-sided or bilateral IJV stenosis threshold emerging as a promising imaging covariate for supporting the clinical diagnosis of TGA. These results suggest that MRI assessment of SJVC severity may improve diagnostic accuracy in atypical TGA presentations.
Muneer et al. (Thu,) studied this question.