1. Sinus blocks, pauses, and arrests all have one big thing in common: the lack of a ___ wave.
2. A sinus block refers to a complete block or failure of the depolarization wave to capture or depolarize the _______ myocardium.
3. SA blocks can never last for three cycles. True or False.
4. The hallmark of a sinus block is that the pause is always an exact multiple of the normal _–_ ________.
5. The sinus pacemaker is reset in the case of a sinus block. True or False.
6. _______________ can sometimes be mistaken for sinus blocks. Choose the best one:
A. Sinus arrhythmias
B. Sinus tachycardias
C. Junctional escape rhythms
D. Premature atrial contractions
7. A sinus ________ is caused by a delay in the formation of a sinus impulse in the SA node itself.
8. A sinus ________ is caused by a longer delay in the formation of an atrial impulse.
9. A sinus arrest can be caused by any combination of sinus pause or block. In any case, it is an extremely long delay. True or False.
10. Neither sinus pauses nor sinus arrests are ever an exact multiple of the normal P-P interval. True or False.