Cardiac<unk>  are caused by one of two major mechanism. The first of<unk>  is a result of enhanced or abnormal impulse formation originating at the pacemaker or the His-Purkinje network. The second is due to reentry conduction disturbances.
Arrhythmia
Drowning
Proarrhythmia
Atrial fibrillation
Hypsarrhythmia
Reflex syncope  Reflex syncope  1
Cardiovascular drift
Myocardial infarction