This retrospective study evaluates the efficacy and outcomes of left carotid antegrade cerebral perfusion (LCP) versus traditional right-sided perfusion with hypothermic circulatory arrest in hemiarch aortic aneurysm repairs. The study, encompassing 68 patients between 2015 and 2019, suggests that LCP via distal arch cannulation is a viable and safer alternative, showing comparable clinical outcomes but reduced cardiopulmonary bypass and cerebral perfusion times. The findings advocate for LCP as a method that potentially reduces the risks associated with circulatory arrest.