Is geomagnetic activity a risk factor for sudden unexplained death in epilepsies?
Neurology
; 54(4): 903-8, 2000 Feb 22.
Article
em En
| MEDLINE
| ID: mdl-10690984
ABSTRACT
OBJECTIVE:
To test the hypothesis that sudden unexplained death (SUD) in epilepsy is related to geomagnetic activity.BACKGROUND:
Prior studies presume that geomagnetic activity (with average amplitudes above 50 nanotesla [nT]) is associated with SUD in epileptic human patients and in epileptic laboratory rats.METHODS:
In a retrospective study, 46 epileptic patients with definite SUD were compared with 108 epileptic patients with known cause of death (KCD) who died between 1981 and 1992. A complete postmortem examination was performed in all cases. The time of the day and date of death, as well as two international geomagnetic indices concerning Bartels' planetary 3-hour signs (Kp) and the mean planetary daily amplitudes (Ap) at time of death, were assessed.RESULTS:
Among 45 SUD individuals, the local time (37.8%) and the universal time of death (35.6%) peaked within the critical period between 3 to 9 AM. However, the SUD and KCD group did not substantially differ in regard to the distribution of local or universal time of death (p > 0.2, Fisher test). Neither the Kp signs at death and 2 hours before death nor the Ap values showed considerable differences between the SUD and KCD series (p > 0.2, Mann-Whitney test). Merely 4.3% of SUD patients and 3.7% of KCD patients were associated with Ap indices above 50 nT (p > 0.2, Fisher test).CONCLUSION:
The results do not support the hypothesis that geomagnetic activity is related to occurrence of sudden unexplained death in epileptic patients.
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Base de dados:
MEDLINE
Assunto principal:
Morte Súbita
/
Campos Eletromagnéticos
/
Epilepsia
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article