Sinus Arrest

Question 1

What is Sinus Arrest?

Answer 1

Failure of the SA node to initiate an impulse
*Disorder of automaticity

Question 2

How will a sinus arrest be shown on a EKG?

Answer 2

1. Pause is greater than or equal to 1.6 seconds
2. Basic rhythm does not resume on time
   *no compensatory pause
3. Normal P waves, PR interval, QRS complex

Question 3

What does 1.6 seconds equal to?

Answer 3

40 small boxes or 8 large squares

Question 4

What must be present in order to call it Sinus Arrest?

Answer 4

An underlying sinus mechanism