Assertion: lead's electrode | /r/AtLocation | the skin
Facets:
value: to monitor electrical impulses
type: PURPOSE
value: during an electrocardiogram
type: TEMPORAL
Source sentences:
text: It is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin.
text: During an electrocardiogram, electrodes are placed on the skin to monitor electrical impulses inside the heart.