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FIRST DEGREE ATRIOVENTRICULAR (AV) BLOCK:

A slowing of the conduction from the atria to the ventricles through the atrioventricular (AV) node

•PR interval > 0.2 seconds.

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Scott L. Siegal, D.O. FACOI, S.L. Siegal Consulting, and Executive Electrocardiogram Education have no relevant financial or nonfinancial relationships with ineligible entities to disclose.

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