User blog comment:Hawki/Interview with Glynnis Campbell/@comment-26354460-20150525161739/@comment-58609-20150525225659

I suspect that her lines were re-recorded for the medic as well. First, Lani Manella has been credited as the medic in SC2 on both Wikipedia and YouTube. Second, there's a subtle but distinct difference between the SC1 and SC2 medic in regards to the voice acting, so I doubt Helfer's lines were in the final product.