Assertion: pacemaker's lead | /r/HasProperty | positioned through the vein
Facets:
value: under the collarbone
type: LOCATION
value: into the heart chambers
type: TRANSITIVE-OBJECT
Source sentences:
text: Placing a pacemaker: Pacing leads (one to three) are positioned through the vein under the collarbone (subclavian vein) into the heart chambers and affixed to the heart muscle.