'Scared To Death' May Not Just Be A Saying

Dr. David Frid says being frightened can have a number of effects on the heart.
3:00 | 10/24/12

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Transcript for 'Scared To Death' May Not Just Be A Saying
Well we know that the body's response to a very stressful or frightening situation and is what's been referred to is the fight or flight response and that's when people. Really are trying to get themselves ready to respond to a very. Stressful or frightening or dangerous situation. The body pumps out a lot of extra -- -- -- Lander katic call remains to try to allow the body to either be able to run really faster to. Fight really hard to defend itself. That searching katic call -- means is. Done by the brain. And it can have. A number of different effects on the heart. It can affect the heart's electrical system and cause the heart to go into a Rick -- are funny -- redon mistaken have. A bad effect and cause even sudden death. They can have effects on the blood vessels. In the heart causing them to. Clamped down even if -- stop blockages or spasm. Which can cause somebody to have an event like a heart attack. Or they can have -- direct effect on the heart muscle and cause the heart muscle to not work as well as it should it's not squeeze as well as it. Should be. I think hurt the average person in the likelihood of getting scared to death. Is basically nonexistent. It can occur in the rare and stands and we're talking about in a very rare instance there's no way to really predict who might be. More likely to have one of these offense. They would be more likely and somebody who does have underlying heart disease. And that's why it off then there is recommendations. That -- people with heart disease don't go on things like roller coasters because the sudden. Fear. Type of response -- you might --

This transcript has been automatically generated and may not be 100% accurate.

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