A PR interval consistently longer than 0.20 seconds (greater than 5 small boxes) indicates a first-degree AV block. Note: There is a 1:1 ratio between P waves and QRS complexes, unlike 2nd degree ...
A PR interval consistently longer than 0.20 seconds, or greater than five small boxes, indicates a first degree AV block. In general, a first-degree AV block is a benign finding that does not ...
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