The rhythm in which the SA node discharges impulses at a rate between 100 and 160 is called:
A) sinus bradycardia.
B) sinus tachycardia.
C) normal sinus rhythm.
D) sinus arrhythmia.

Question

Quizplus · Accepted Answer

Sinus tachycardia is defined as a normal rhythm with a rate greater than 100 beats/min but less than 160 beats/min. Sinus bradycardia is defined as a normal rhythm with a rate less than 60 beats/min. Normal sinus rhythm refers to a rhythm within the range of 60-100 beats/min. Sinus arrhythmia is a variation in the heart rate that occurs with breathing, where the rate increases on inspiration and decreases on expiration.

The Rhythm in Which the SA Node Discharges Impulses at a Rate