Question

When there is no variation in R-R intervals, it is called _____.

a) Tachycardia
b) Bradycardia
c) Atrial fibrillation
d) Atrial flutter

Answer 1

When there is no variation in R-R intervals, it is called a third-degree block.

Step-by-step explanation:

When there is no variation in R-R intervals, it is called third-degree block. In a third-degree block, there is no correlation between atrial activity (the P wave) and ventricular activity (the QRS complex).