Second Degree Heart Block Type I

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EKG Drill Answer

This is Second Degree Heart Block Type I. Look for rhythm that is irregular but with progressively longer pr interval lengthening, with heart rate that is the underlying rate. Notice that the P wave is normal. The PR interval is progressively longer until a qrs complex is missed, then cycle repeats. The QRS is typically normal (0.06-0.10 sec).

EKG Arrhythmia Practice Drill Tracing

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