Conclusion
Coexistence of subaortic membrane and persistence SVCs is a very rare
finding. Diagnosis of dilated coronary sinus can be easily confirmed by
saline contrast echocardiography. When a dilated coronary sinus is
present on echocardiography, it may be a clue towards the possibility of
PLSVC. The role of noninvasive approaches in cardiac imaging such as
echocardiography, cardiac CT and MRI should be considered for the
diagnosis of both subaortic membrane and PLSVC. Persistence of both
superior vena cava (SVCs) with subaortic membrane is very rarely seen
but multi-model cardiac imaging can help to make accurate diagnosis.