The rate of a sinus bradycardia is _____ beats/min
a. slower than 60
b. 60 to 100
c. 80 to 120
d. faster than 100
B
If the SA node fires at a rate that is slower than normal for the patient's age, the rhythm is called sinus bradycardia. The rhythm starts in the SA node and then travels the normal conduction pathway, resulting in atrial and ventricular depolarization. In adults and adolescents, a sinus bradycardia has a heart rate of less than 60 beats/min. The term severe sinus bradycardia is sometimes used to describe a sinus bradycardia with a rate of less than 40 beats/min.
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