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People with depression have high concentrations of norepinephrine, a nervous system hormone that signals blood vessels to constrict and ratchets up blood pressure, researchers report. Treating these individuals with electroshock therapy lowers their norepinephrine concentrations-and their heart rate and blood pressure too, scientists find.
A fast pulse, vessel constriction, and high blood pressure are valuable tools in a person's fight-or-flight response. But if high norepinephrine concentrations chronically Keep a person in that state, it puts a strain on the heart, says Mitchel A. Kling, a psychiatrist at the National Institute of Mental Health in Bethesda, Md.…
Source: HighBeam Research, Positive jolt: electroshock therapy may have side benefit.(This Week)