Browsing by Author "Ammirati, F"
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- ItemDo European GSM mobile cellular phones pose a potential risk to pacemaker patients?(1995-10-02) Barbaro, V; Bartolini, P; Donato, A; Militello, C; Altamura, G; Ammirati, F; Santini, MA series of in vivo trials were carried out in order to verify whether the electromagnetic field radiated by GSM Groupe Systemes Mobiles mobile cellular phones might affect implanted pacemakers Two European GSM phones of 2 watt power were tested and trials conducted on 101 pacemaker implanted outpatients attending day hospital for routine check up who volunteered for trials Forty three pacemaker models from 11 manufacturers were tested in all When the sensing threshold of the pacemakers was set at a minimum and the antenna of the phone was in direct contact with the patient s chest interference was detected for 26 implanted pacemakers Specifically pulse inhibition in 10 of 101 cases ventricular triggering in 9 of 46 DDD VDD pacemakers and asynchronous pacing in 4 of 52 devices Pulse inhibition was also observed combined with asynchronous pacing in 1 of 52 cases and with ventricular triggering in 2 of 46 cases Minimum effect duration was ca 3 seconds but in 6 cases effects continued as long as the interfering GSM signal was on No permanent malfunctioning or changes in the programmed parameters were detected Whenever interference was detected trials were repeated to determine the maximum sensing threshold at which interference persisted with the antenna in contact with the skin over the pacemaker Then maximum distance between antenna and pacemaker at which interference occurred was determined at pacemaker maximum and minimum sensing threshold Under our experimental conditions electromagnetic interference effects were detected at a maximum distance of 10 cm with the pacemaker programmed at its minimum sensing threshold ABSTRACT TRUNCATED AT 250 WORDS
- ItemInfluence of digital and analogue cellular telephones on implanted pacemakers.(1997-11-24) Altamura, G; Toscano, S; Gentilucci, G; Ammirati, F; Castro, A; Pandozi, C; Santini, MThe aim of this study was to find out whether digital and analogue cellular phones affect patients with pacemakers The study comprised continuous ECG monitoring of 200 pacemaker patients During the monitoring certain conditions caused by interference created by the telephone were looked for temporary or prolonged pacemaker inhibition a shift to asynchronous mode caused by electromagnetic interference an increase in ventricular pacing in dual chamber pacemakers up to the programmed upper rate The Global System for Mobile Communications system interfered with pacing 97 times in 43 patients 21 5 During tests on Total Access of Communication System telephones there were 60 cases of pacing interference in 35 patients 17 5 There were 131 interference episodes during ringing vs 26 during the on off phase P Under 0 0001 106 at maximum sensitivity level vs 51 at the base value P Under 0 0001 Prolonged pacing inhibition 4 s was seen at the pacemaker base sensing value in six patients using the Global system but in only one patient using Total Access