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Normally, the four chambers of the heart (two atria and two ventricles) contract in a very specific, coordinated way. The electrial impulse that signals your heart to contract in a synchronized way begins in the sinoatrial node (SA node). This nod...
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In most cases, the cause of atrial fibrillation and flutter can be found, but often it cannot. Causes of these heart beat abnormalities include: many types of heart disease stress and anxiety caffeine alcohol tobacco diet pills some prescription a...
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