Beta blockers
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Beta blockers
Beta blockers, which were first used in 1960, are drugs
that reduce the workload of the heart by blocking certain effects of the
sympathetic nervous system (the system responsible for events in our body
during stress!) that can cause a rapid heartbeat. They are called
"beta-blockers" because they block areas in the heart called
"beta receptors".
These beta receptors are normally activated by certain
hormones (such as adrenaline) that are released during stress. When activated
by stress hormones, beta receptors trigger a reaction that increases heart rate
and heart rate.
Beta blockers, on the other hand, prevent stress hormones
from triggering this reaction by binding to beta receptors. Thus, beta-blockers
reduce cardiac stress by slowing the heart rate and reducing the force of
contraction (pump function) of the heart muscles.
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