What does paradoxical bradycardia mean?

Paradoxical Bradycardia is not so much a type of Bradycardia (slow heart beat), rather, it is a way of describing an action.

For example, Atropine Sulfate is a drug used to increase heart rate in life threatening brady arrhythmias. However, when pushed slowly, or with low doses, it can actually CAUSE bradycardia. Therefore, Atropine, a drug intended to INCREASE a heart rate, can actually cause the rhythm to occur it is intended to reverse.

Paradox is defined as: One exhibiting inexplicable or contradictory aspects.

Brady is Greek meaning: Slow

Cardia is Greek meaning: Heart

Hope this makes sense!