New Questions Under Discussion: EP Guidelines Our lab is looking for evidence-based guidelines to support our policies and procedures for electrophysiology studies. Can you help? D. VanLiew Readers, to reply to this question, please type EP Guidelines in your subject line. EP Surgical Masks Is there any information on using cotton surgical masks for invasive EP and device implant procedures? name withheld Readers, to reply to this question, please type EP Surgical Masks in your subject line.