The answer would be the third choice, <u>a study printed by the American Health Association.
</u><u />Hope this helps :)<u>
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Benzodiazepines are medications that have been commonly used to assist in withdrawals. Methadone is used to control withdrawal symptoms and can be continued for much longer to help the patient stay clean.
The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate). The cells that create these rhythmic impulses, setting the pace for blood pumping, are called pacemaker cells, and they directly control the heart rate. They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. Hope this helps!