Answer to Question 1
Answer to Question 2
Rhythm Regular.
Rate 101 to 180 beats/min.
P waves May occur before, during, or after the QRS; if visible, the P wave is inverted in leads II, III, and aVF.
PR interval If a P wave occurs before the QRS, the PR interval will usually be 0.12 sec or less; if no P wave occurs before the QRS, there will be no PR interval.
QRS duration 0.11 seconds or less unless abnormally conducted.