Persistent hypoglossal artery (PPHA) is the second most common carotid-vertebrobasilar anastomosis, with an estimated prevalence of 0.02%–0.1%, with 65% of them being left-sided.
It's a very meaningful thing to build an emergency medical aid system to deal with PPHA. This system can effectually prevent PPHA and control PPHA in time. It can ensure public's health and life.