What is the condition called when the SA node fails to depolarize the atria?
a. sinus pause
b. cardiac failure
c. atrial flutter
d. hypersensitization
Answer: a. sinus pause
When the SA node fails to depolarize the atria, it is called sinus pause, or sinus arrest. if not corrected by another part of the heart, such as the AV node, this could lead to cardiac arrest.