Heart rate variability during interictal epileptiform discharges
2003; Elsevier BV; Volume: 54; Issue: 2-3 Linguagem: Inglês
10.1016/s0920-1211(03)00059-7
ISSN1872-6844
AutoresMegdad Zaatreh, Stephen R. Quint, Michael B. Tennison, O’Neill D’Cruz, Bradley Vaughn,
Tópico(s)Heart Rate Variability and Autonomic Control
ResumoRationale: Seizures may produce a variety of autonomic alterations. These alterations may occur due to evoked autonomic reflexes or as a direct cortical effect on autonomic control. In animal studies, lock step phenomena of interictal discharges to autonomic output have been repeatedly documented. However, the association of interictal discharges and autonomic output is not as well established in humans. Methods: RR intervals timely locked to interictal epileptiform discharge (RRn) were compared to RR intervals immediately following (RRn+1) interictal discharges in 40 patients with focal onset epilepsy and low baseline heart beat variability. Results: In 20 patients with 200 left sided interictal epileptiform discharges, RRn shortened in 100 and prolonged in 31 when compared to RRn+1 intervals. While in 20 patients with 200 right sided interictal epileptiform discharges RRn intervals shortened in 17 and prolonged in 116 (Chi square P<0.001). No consistent differences in RRn intervals variability between frontal versus temporal localization of the interictal discharges from the same side was found. Conclusions: Interictal discharges, may influence autonomic control over the cardiac cycle and agree with animal studies. Further study of the relationship of interictal discharges to autonomic output is needed to delineate the potential lateralized influences over autonomic nervous system.
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