Which of the following is found when a patient has sinus arrhythmia?
1. Rate decreases during expiration.
2. Rate decreases during inspiration.
3. Rate varies by more than 10% from beat to beat.
4. Rate increases during inspiration.
a. 3
b. 2, 3
c. 1, 4
d. 1, 3, 4
D
Sinus arrhythmia has the following identifying traits: rate decreases during expiration, rate varies by more than 10% from beat to beat, and rate increases during inspiration.
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