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Researchers believe the increase in heart rate might demonstrate what they call the fight or flight response.

VOA: special.2009.08.18

After the president's speech, the Republican response will be given by Representative Charles Boustany, a heart surgeon from the Southern state of Louisiana.

VOA: standard.2009.09.08

Implantable cardioverter-defibrillators (ICDs) are small battery-powered devices that can deliver a small electric shock to the heart in response to a life-threatening arrhythmia (when the heart starts beating rapidly and inefficiently).

FORBES: Practicing Medicine Against the Evidence: The Case of Implantable Defibrillators

Another group, led by William Ditto at the Georgia Institute of Technology and Francis Witkowski at the University of Alberta, is using a dye that lights up in response to voltage changes to map the heart's response.

ECONOMIST: Better living through chaos

The industry can even take heart from the response to the crisis by Massachusetts Congressman Ed Markey, a long-time nuclear energy foe.

FORBES: An Immodest Proposal to Spur Nuclear Energy Industry Growth -- and Global Safety