____ is defined as a heart rate that is under 60 beats per minute for an adult or below the lower limit of normal for a child.

Question

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Bradycardia is defined as a heart rate that is under 60 beats per minute for an adult or below the lower limit of normal for a child. Tachycardia, on the other hand, is a heart rate that is above the upper limit of normal for a given age and activity level. Fibrillation refers to a rapid, irregular heart rhythm, and dilation refers to the enlargement of a blood vessel or hollow organ.

____ Is Defined as a Heart Rate That Is Under