What is the normal heart rate range for the sinus node?

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Prepare for the AACN Essentials of Critical Care Nursing Test. Study with multiple choice questions and thorough explanations. Ace your test effortlessly!

Multiple Choice

What is the normal heart rate range for the sinus node?

Explanation:
The sinus node acts as the heart’s natural pacemaker, setting the resting heart rate in a healthy adult to about 60 to 100 beats per minute. This rate is the default intrinsic pace produced by the SA node, with the autonomic nervous system able to raise (sympathetic) or slow (parasympathetic) the rate as needed. Values below 60 are considered bradycardia, values above 100 are tachycardia. Among the options, 60 to 100 times per minute is the normal resting range for the sinus node.

The sinus node acts as the heart’s natural pacemaker, setting the resting heart rate in a healthy adult to about 60 to 100 beats per minute. This rate is the default intrinsic pace produced by the SA node, with the autonomic nervous system able to raise (sympathetic) or slow (parasympathetic) the rate as needed. Values below 60 are considered bradycardia, values above 100 are tachycardia. Among the options, 60 to 100 times per minute is the normal resting range for the sinus node.

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