brachycardia - definition of brachycardia by Medical dictionary
brach·y·car·di·a (br k-kär d-) n. See bradycardia. brachycardia. See bradycardia. bradycardia [brad″e-kahr´de-ah] slowness of the heartbeat, so that the pulse rate is less than 60 per minute. This can occur in normal persons, particularly during sleep; tr...