It relates more particularly to pacemaker, defibrillator and cardiovertor devices that are in particular equipped with that is known as “Holter” memory functions that allow a continuous monitoring of the of heartbeat rate parameters, as well perhaps as the memorizing of marker codes corresponding to {TAIL ~ those events} , known as {HEAD ~ event markers}, to evaluate the stability of the heartbeat rate for diagnostic and therapeutic purposes 
It relates more particularly to pacemaker , defibrillator and cardiovertor devices that are in particular equipped with that is known as “ Holter ” memory functions that allow a continuous monitoring of the of heartbeat rate parameters , as well perhaps as the memorizing of marker codes corresponding to { TAIL ~ those events } , known as { HEAD ~ event markers } , to evaluate the stability of the heartbeat rate for diagnostic and therapeutic purposes
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