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[Could C- and D-network mobile phones endanger patients with pacemakers]?

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Hofgartner F, Muller T, Sigel H · 1996

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Early mobile phones caused dangerous pacemaker malfunctions in 41% of tested patients, proving EMF can interfere with life-critical medical devices.

Plain English Summary

Summary written for general audiences

German researchers tested 104 pacemaker patients with early mobile phones (analog and digital networks) to see if the devices interfered with their heart rhythm devices. They found that 41% of patients experienced dangerous pacemaker malfunctions, including complete inhibition and irregular heart rhythms, when exposed to mobile phone signals. Higher-power phones caused interference at greater distances than lower-power models.

Why This Matters

This 1996 study represents crucial early evidence of EMF interference with critical medical devices. While the specific phone technologies tested are now obsolete, the fundamental physics remains relevant - radiofrequency radiation can disrupt sensitive electronic medical implants. What makes this research particularly significant is that it documented life-threatening interference in real patients, not just laboratory conditions. The 41% interference rate among pacemaker patients demonstrates that EMF effects aren't theoretical - they can have immediate, measurable consequences for vulnerable populations. Modern pacemakers have improved shielding, but the proliferation of wireless devices means patients face exponentially more EMF exposure today than in 1996.

Exposure Information

Specific exposure levels were not quantified in this study.

Study Details

To investigate prospectively the extent of potentially harmful interference of cardiac pacemakers by mobile phones in the C (analog) and D (digital) networks in use in Germany.

104 patients (54 men, 50 women; mean age 75.8 [40-100] years) with 58 different implanted pacemaker ...

28 different pacemaker types (48.3%) in 43 patients (41.3%) showed interference in the form of pacem...

Patients with implanted pacemakers should if possible not use mobile phones in the C and D networks. Individual testing with suitable programming of pacemaker sensitivity and polarity can reduce the risk of interference.

Cite This Study
Hofgartner F, Muller T, Sigel H (1996). [Could C- and D-network mobile phones endanger patients with pacemakers]? Dtsch Med Wochenschr 121(20):646-652, 1996.
Show BibTeX
@article{f_1996_could_c_and_dnetwork_2203,
  author = {Hofgartner F and Muller T and Sigel H},
  title = {[Could C- and D-network mobile phones endanger patients with pacemakers]?},
  year = {1996},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/8635399/},
}
PubMed: 8635399

Cited By (16 papers)

Quick Questions About This Study

Yes, mobile phones can seriously interfere with pacemakers. A 1996 German study found that 41% of pacemaker patients experienced dangerous malfunctions when exposed to early mobile phone signals, including complete device shutdown and irregular heart rhythms.
Cell phones pose significant risks for pacemaker patients. Research testing 104 patients found that mobile phone radiation caused pacemaker interference in 41% of cases, leading to potentially life-threatening malfunctions like device inhibition and abnormal heart rhythms.
Phone radiation can severely affect implanted heart devices. German researchers discovered that mobile phone signals interfered with 28 different pacemaker types, causing dangerous malfunctions in over 40% of tested patients with various cardiac implants.
Pacemaker interference risks from phones include complete device shutdown, irregular heart rhythms, and switching to dangerous frequencies. A clinical study found these serious malfunctions occurred in 41% of pacemaker patients exposed to mobile phone signals.
Mobile phones impact pacemaker function by causing electromagnetic interference that can inhibit the device, trigger abnormal heart rhythms, and disrupt normal pacing. Higher-power phones created interference at greater distances than lower-power models in clinical testing.