What Variance in RR Intervals Must Be Present to Be

question 20

Multiple Choice

What variance in RR intervals must be present to be considered sinus arrhythmia?

• A) more than 10%
• B) more than 20%
• C) more than 30%
• D) more than 40%

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Definitions:

Conditioned Stimulus

A previously neutral stimulus that, after being repeatedly paired with an unconditioned stimulus, elicits a conditioned response.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without prior conditioning.

Tone

The quality or character of sound, or the attitude expressed in writing or speech, conveyed through the choice of words and style.

Air Puff

A method often used in psychological experiments to deliver a quick burst of air as a stimulus or to measure blink reflexes.