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Tachycardias that start in the upper chambers of the heart are also common forms. These include atrial fibrillation, atrial flutter/tachycardia, and supraventricular tachycardia. A period of elevated heart rates is typically followed by very slow ...
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Sick sinus syndrome may be brought on by the use of certain drugs, but is most common in elderly patients. Cardiac amyloidosis , a condition in which amyloid, a kind of protein, builds up in heart tissue, may affect the sinus node. Other condition...
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