Abstract:
:The effect of nuclear magnetic resonance (NMR) imaging on six representative cardiac pacemakers was studied. The results indicate that the threshold for initiating the asynchronous mode of a pacemaker is 17 gauss. Radiofrequency levels are present in an NMR unit and may confuse or possibly inhibit demand pacemakers, although sensing circuitry is normally provided with electromagnetic interference discrimination. Time-varying magnetic fields can generate pulse amplitudes and frequencies to mimic cardiac activity. A serious limitation in the possibility of imaging a patient with a pacemaker would be the alteration of normal pulsing parameters due to time-varying magnetic fields.
journal_name
Radiologyjournal_title
Radiologyauthors
Pavlicek W,Geisinger M,Castle L,Borkowski GP,Meaney TF,Bream BL,Gallagher JHdoi
10.1148/radiology.147.1.6828720subject
Has Abstractpub_date
1983-04-01 00:00:00pages
149-53issue
1eissn
0033-8419issn
1527-1315journal_volume
147pub_type
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