You searched for: “bradycardiaphobia
bradycardiaphobia (s) (noun), bradycardiaphobias (pl)
A fear that one's extremely slow beating of the heart and that he or she may be close to death: Pearl was told by her doctor that having bradycardiaphobia is not necessarily deadly; however, it is a secondary reaction that sometimes follows an initial phase of rapid heartbeats after a blood-injury.