title: The early ECG in medical practice.
abstract: The technique of electrocardiography was not available to the medical practitioner until the string galvanometer was made small enough to be portable.
mesh_terms: D004562:Electrocardiography / Q000266:history* / Q000295:instrumentation; D005060:Europe; D049672:History, 19th Century; D049673:History, 20th Century; D014481:United States