Is geomagnetic activity a risk factor for sudden unexplained death in epilepsies?

Area of Science:

• Neurology
• Environmental Science
• Epidemiology

Background:

• Previous research suggested a link between geomagnetic activity and sudden unexplained death (SUD) in epilepsy patients and rats.
• Geomagnetic activity, defined by amplitudes above 50 nanotesla (nT), was presumed to be a contributing factor.

Purpose of the Study:

• To investigate the hypothesis that geomagnetic activity influences the occurrence of sudden unexplained death (SUD) in epilepsy.
• To determine if geomagnetic indices correlate with SUD events in epileptic individuals.

Main Methods:

• A retrospective case-control study comparing 46 epileptic patients with SUD to 108 epileptic patients with known cause of death (KCD).
• Analysis of geomagnetic indices, including Bartels' planetary 3-hour signs (Kp) and mean planetary daily amplitudes (Ap), at the time of death.
• Assessment of local and universal time of death for both groups.

Main Results:

• No significant differences were observed in the distribution of local or universal time of death between SUD and KCD groups.
• Geomagnetic indices (Kp and Ap) showed no considerable differences between the SUD and KCD series.
• A small percentage of both SUD (4.3%) and KCD (3.7%) patients were associated with Ap indices above 50 nT, with no statistically significant difference.

Conclusions:

• The study's findings do not support the hypothesis linking geomagnetic activity to sudden unexplained death in epileptic patients.
• Current evidence does not establish a relationship between geomagnetic fluctuations and epilepsy-related mortality.