Sinus arrhythmia

safaTerkawi

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2022-08-18

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Sinus arrhythmia.

Refers to the cyclical changes in blood pressure that accompany the respiratory cycle.
Can be observed in normal people.
Has a greater amplitude in old than in young people.
Is mediated mainly through sympathetic nerves to the heart.
Can be used as an index of autonomic nerve function.

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safaTerkawi

2022-08-18

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A. False It refers to the cyclical changes in heart rate that accompany the respiratory cycle.

B. True It is a normal, harmless phenomenon.

C. False It decreases in amplitude with age.

D. False It is mediated by vagal nerves and abolished by vagal blockade with atropine.

E. True It is impaired in vagal autonomic neuropathy.

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