Sinus Bradycardia Drill Score 0 correct out of 0 attempts EKG Drill Answer This is Sinus Bradycardia. Look for rhythm that is regular, with heart rate that is slow (< 60 bpm). Notice that the P wave is normal. The PR interval is normal (0.12-0.20 sec). The QRS is typically normal (0.06-0.10 sec).