In sinus arrhythmia,the heart rate
A)speeds up during inspiration and expiration.
B)speeds up during inspiration,slows during expiration.
C)slows during inspiration and expiration.
D)slows during inspiration,speeds up during expiration.

Question

Quizplus · Accepted Answer

Sinus arrhythmia is a natural variation in heart rate that occurs during a breathing cycle, where the heart rate increases during inspiration and decreases during expiration. This is due to the influence of the vagus nerve on the heart during the respiratory cycle.

In Sinus Arrhythmia,the Heart Rate