Question

During sinus arrhythmia

• A. Heart rate increases during inspiration
• B. Heart beat decreases during inspiration
• C. Heart rate increases during expiration
• D. Heart rate remains constant

Answer 1

Answer: (A)

Heart rate increases during inspiration

• Sinus arrhythmia is a normal phenomenon in which heart rate increases during inspiration and decreases during expiration.
• This is due to reflex changes in vagal nerves. It is most commonly seen in children and young adults.
• It is interpreted using ECG. It is cyclic changes that occur in heart rate during normal breathing.

Thus, the correct answer is option A.