Question 1
Atrial fibrillation has
◦ P waves of multiple shapes.
◦ no P waves at all.
◦ P waves with uniform shape.
◦ sawtooth-shaped waves between the QRS complexes.
Question 2
The most common cause of an unexplained pause is a(n)
◦ sinus arrest.
◦ nonconducted PAC.
◦ atrial tachycardia.
◦ sinus block.