title: [An unknown contribution of Polish scientists to the development of electrocardiography].
mesh_terms: D004562:Electrocardiography / Q000266:history* / Q000295:instrumentation; D004594:Electrophysiology; D049672:History, 19th Century; D006801:Humans; D011044:Poland; D013514:Surgical Procedures, Operative
vernacular_title: Nieznany wkład polskich badaczy w rozwój elektrokardiografii.