caused by extreme bradyarrhythmia asystole or extreme bradycardia while a high energy shock can be effective for treating a ventricular tachyarrhythmia it can be useless for treating an extreme bradyarrhythmia when a patient has such bradyarrhythmia he could also faint i e become unconscious there are a number of ways for determining whether the unconscious bradyarrhythmia condition is met in some embodiments the determination is made from the physiological parameter either in part or exclusively in other embodiments the determination is made from the patient 39 s ecg such as by counting qrs complexes defibrillator 200 optionally further includes a memory 238 which can work together with processor 230 memory 238 may be implemented in any number of ways such ways include by way of example and not of limitation volatile memories nonvolatile memories nvm read only memories rom random access memories ram magnetic disk storage media optical storage media smart cards flash memory devices any combination of these and so on memory 238 is thus a non transitory storage medium memory 238 if provided can include programs for processor 230 and so on the programs can include sets of instructions the programs can be operational for the inherent needs of processor 230 and.