Abstract：
BACKGROUND:State-of-the art cardiac pacemakers are protected against radiofrequency signals. Although there have been earlier clinical and in vitro reports of cellular phone interference with implantable devices, only a few studies have been performed in recent years. The ringing phase of digital GSM or PCS cellular phones includes a brief period of peak radiated power. OBJECTIVES:This study tested the protection offered by electromagnetic filters of cardiac pacemakers against cellular phone ringing. METHODS:We performed 330 consecutive tests in 158 patients at the time of routine examination in our pacemaker follow-up clinic. The programmed parameters remained unchanged before testing. During electrocardiographic monitoring, 2 single-band digital cellular phones consecutively placed over the pacemaker pocket each received a call. The phone systems tested were 1) GSM at a maximal power output of 2 W, operating on a 900 MHz carrier frequency, and 2) PCS at a maximal output of 1 W, operating on a 1800 MHz carrier frequency. RESULTS:Interference was noted in only 5 tests, due to interaction by the GSM system with 4 unprotected pacemaker models. The GSM test was negative in 12 other tests of identical pulse generator models. The overall incidence of interference was 1.5% of tests. CONCLUSIONS:Interference by cellular phone ringing occurred only with unprotected pacemaker models. Standard programming of these unprotected models was associated with a low incidence of interference.
journal_name
Heart Rhythmjournal_title
Heart rhythmauthors
Trigano A,Blandeau O,Dale C,Wong MF,Wiart Jdoi
10.1016/j.hrthm.2005.03.011keywords:
subject
Has Abstractpub_date
2005-08-01 00:00:00pages
837-41issue
8eissn
1547-5271issn
1556-3871pii
S1547-5271(05)01424-4journal_volume
2pub_type
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