Compression of undiagnosed aberrant right subclavian artery during transesophageal echocardiography probe insertion.

Transesophageal echocardiography (TEE) has become an important monitoring tool for the anesthesiologist during repair of intracardiac defects. Although the incidence of reported complications associated with its use is low, one should be careful during the insertion and use of TEE probe, as it may result in potential devastating problems. We present a case of undiagnosed aberrant right subclavian artery (ARSA) that got compressed by the TEE probe during its insertion. It was noticed because of the presence of the right radial artery catheter, else it would have passed unnoticed.