Chapter 11 : Sinus Arrhythmia

Question 1

Normal sinus rhythm can normally have some slight variability in the regularity of the complexes. But the difference between the longest and shortest intervals should never be greater than 0.16 seconds.

Answer 1

True

Question 2

Sinus arrhythmia refers to a rhythm of sinus origin that has a variability in the regularity of the complexes of greater than 0.16 seconds.

Answer 2

True

Question 3

What are the two types of sinus arrhythmias?

Answer 3

Respiratory and phasic sinus arrhythmias

Nonrespiratory and Nonphasic arrhythmias

Question 4

Respiratory sinus arrhythmia is caused by what?

Answer 4

Transient vagal stimulation

Question 5

Respiratory sinus arrhythmia is a variant of normal?

Answer 5

True

Question 6

The heart rate normally speeds up during what?

Answer 6

Inspiration

Question 7

Respiratory sinus arrhythmia is normally seen in what?

Answer 7

Older patients and MI patients

Question 8

You should always consider other possibilities closely before making the diagnosis of sinus arrhythmia because, frequently, multiple PVCs can be mistaken for sinus arrhythmia.

Answer 8

False