The efficacy of direct extracranial-intracranial bypass in the treatment of symptomatic hemodynamic failure secondary to athero-occlusive disease: a systematic review. Categories: Extracranial to Intracranial Bypass (EC-IC Bypass) Author: Connolly ES, Garrett MC, Komotar RJ, Merkow MB, Otten ML, Sciacca RR, Starke RM