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.

建立PPHA（PPHA）的应急医疗救治体系可有效地预防、及时地控制和消除PPHA的发生，对保障公众的身体健康与生命安全、维护正常的社会秩序具有非常重要的意义。

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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.

永存舌下动脉（PPHA）是第二常见的颈动脉-椎基底动脉异常吻合，发病率约为0.02%-1%，其中约65%发生在左侧。

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