What Causes a Racing Heartbeat?
The normal heart rate for a healthy adult is between 60 and 100 beats per minute. Anything higher is considered tachycardia, or a racing heartbeat. Tachycardia can come on without warning and go away just as quickly, or it can be a long-term problem.
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About the Heart Rate
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The heart rate is controlled by electrical impulses sent across the heart tissue with each beat. A racing heart beat occurs when abnormalities cause these impulses to be sent too quickly.
Types
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There are several common types of tachycardia. Atrial fibrillation or flutter affects the heart atria, ventricular tachycardia or fibrillation affects the heart ventricles, and supraventricular tachycardia occurs above the ventricles.
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External Causes
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Illicit drug use, especially cocaine, excessive alcohol consumption, smoking, drinking too much caffeine and certain over-the counter medications including nasal decongestants can all cause a racing heart beat.
Medical Conditions
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Heart disease, a history of heart attack and structural abnormalities can cause tachycardia. Previous trauma, including being struck by lightning, can also have a long-term effect on heart rate.
Emotional Causes
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Tachycardia can also be brought on by emotional issues such as stress, anxiety and feelings of panic. People who become easily excited or overwhelmed are likely to experience temporary tachycardia.
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