Figure 2From: Abnormal origin of internal thoracic artery from the thyrocervical trunk: surgical considerations Schematic representation of the blood steal phenomenon. Both myocardium and shoulder area may present blood supply deficiency, as the internal thoracic artery (ITA) and the suprascapular artery arise from a common trunk and receive a limited amount of blood. CCA: Common Carotid Artery, SCA: Subclavian Artery, ASM: Anterior Scalene Muscle.Back to article page