Assertion: beta blocker | /r/CapableOf | slow the heartbeat
Facets:
Source sentences:
text: By blocking the action of the involuntary nervous system on the heart, beta blockers slow the heartbeat and relieve stress on the heart.
text: Beta-blockers is a class of drugs that block substances that stimulate the heart, relieve stress on the heart, slow the heartbeat, and reduces the force with which the heart muscle and blood vessels contract against.