Electrocardiogram.
Kravetz
Robert E
RE
Archives Committee, American College of Gastroenterology.
D000818:Animals; D004562:Electrocardiography / Q000266:history*; D004566:Electrodes / Q000266:history*; D004867:Equipment Design / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011898:Ranidae