P Waves? U Waves? Or Both? Health & Medical Heart Diseases Last updated Wednesday, April/10/2019 25 Share P Waves? U Waves? Or Both? Figure. Questions answered incorrectly will be highlighted.The waves indicated by the up-arrows (↑) are which of the following?P waves onlyU waves onlyThe summation of both Source... heart diseases health Medications Drugs Medical 109 25 Share