Assertion: lead's electrode | /r/AtLocation | the chest
Facets:
value: in order to obtain a 12-lead ekg report
type: PURPOSE
Source sentences:
text: A precordial lead refers to one of the six standard electrocardiogram (EKG or ECG) leads, or electrodes, placed on the chest in order to obtain a 12-lead EKG report graphically showing the heart's electrical activity.