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A patient presents with a cardiac arrythmia. Describe (in phases), how the cells in their sinoatrial node should normally behave to prevent the arrythmia

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Answer:

A cardiac arrhythmia simply defined is a variation from the normal heart rate and/or rhythm that is not physiologically justified. Recent years have witnessed important advances in our understanding of the electrophysiologic mechanisms underlying the development of a variety of cardiac arrhythmias. The mechanisms responsible for cardiac arrhythmias are generally divided into 2 major categories enhanced or abnormal impulse formation and  conduction disturbances.

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