When the sinus rhythm exceeds 100 beats per minute, it is called a ____.

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When the sinus rhythm exceeds 100 beats per minute, it is called sinus tachycardia. Choice A, complex tachycardia, refers to any tachycardia that is not a simple sinus tachycardia. Choice B, sinus bradycardia, refers to a sinus rhythm that is slower than 60 beats per minute. Choice D, syndrome of inappropriate sinus tachycardia, refers to a condition in which the heart rate is excessively high at rest or with minimal exertion, without an apparent cause.

When the Sinus Rhythm Exceeds 100 Beats Per Minute, It