. . . "Electrocardiography#Waves and intervals" . . "precordial leads" . "Electrical heart sensor (ECG/EKG)" . . . . "ECG-changes" . . . . . . . . . . . "electrocardiogram" . . . . . "cardiac electrophysiological" . . . "EKGs" . . "Electrocardiography machine" . "ECG Monitor" . "electrocardiograph" . "ECG machine" . . "body electrode" . . "electrocardiographs" . . . . . "the EKG electrode" . . . . . "baseline" . . "Electrocardiogram ECG" . "Electrocardiographic" . . . "electrocardiogram (ECG)" . . "EKG" . . . "electrocardiographic" . . . . "Electrocardiography#Electrodes%20and%20leads" . . . "ECG test" . . "Electrocardiography#Waves_and_intervals" . . "electrocardiography (ECG or EKG)" . . . . . . . "leads" . "Electrocardiography (ECG)" . "ECG (electrocardiogram)" . . "lead" . . "electrocardiograms" . . "12-lead" . "Electrocardiography#PR/PQ interval" . "electrocardiographic parameters" . "portable ECGs" . . . "Clinical electrocardiography" . "Electrocardiogram" . . "electro-cardiograph" . "'''''Electrocardiograph machine'''''" . "ECG" . "cardiac electric waves" . . "cardiogram" . . . . "multiple lead electrocardiograms" . . "Electrocardiography#Axis" . "ECG equipment" . "electrocardiograph machines" . "Electrocardiography#Precordial_leads" . . . . . . "electrocardiography" . . . "ECG trace" . . "Electrocardiograms" . . . . . "electrocardiographic machines" . . . "ECG leads" . "Electrocardiography#Lead_groups" . . . "ST segment" . . . "Electrocardiography#fetal" . . . . . "ECGs" . . . "heart monitor" . "Electrocardiograph" . . "electrocardiogram (ECG or EKG)" . "12-lead ECG" . . . . "Electrocardiography" . . "Electrocardiography#Precordial leads" . . "electrocardiographies" . . . "ECG monitoring" . . . . . . "EGC" . "Electrocardiography" . . "12 lead ECG" . . "cardiac electrical conduction" . "aVF" . . . "electrocardiogram track" .