Treatment of drug-resistant epilepsy in patients with periventricular nodular heterotopia using RNS® System: Efficacy and description of chronic electrophysiological recordings

•Periventricular nodular heterotopia (PVNH) can actively participate in epileptogenic networks.•Low voltage fast activity was the prominent seizure onset pattern in PVNH patients.•RNS® System therapy reduced clinical seizures by 86% in medically-intractable epilepsy with PVNH. Describe changes in cl...

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Veröffentlicht in:Clinical neurophysiology 2019-08, Vol.130 (8), p.1196-1207
Hauptverfasser: Nune, George, Arcot Desai, Sharanya, Razavi, Babak, Agostini, Mark A., Bergey, Gregory K., Herekar, Aamr A., Hirsch, Lawrence J., Lee, Ricky W., Rutecki, Paul A., Srinivasan, Shraddha, Van Ness, Paul C., Tcheng, Thomas K., Morrell, Martha J.
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container_end_page 1207
container_issue 8
container_start_page 1196
container_title Clinical neurophysiology
container_volume 130
creator Nune, George
Arcot Desai, Sharanya
Razavi, Babak
Agostini, Mark A.
Bergey, Gregory K.
Herekar, Aamr A.
Hirsch, Lawrence J.
Lee, Ricky W.
Rutecki, Paul A.
Srinivasan, Shraddha
Van Ness, Paul C.
Tcheng, Thomas K.
Morrell, Martha J.
description •Periventricular nodular heterotopia (PVNH) can actively participate in epileptogenic networks.•Low voltage fast activity was the prominent seizure onset pattern in PVNH patients.•RNS® System therapy reduced clinical seizures by 86% in medically-intractable epilepsy with PVNH. Describe changes in clinical seizure frequency and electrophysiological data recorded in patients with medically-intractable seizures and periventricular nodular heterotopias (PVNH) treated with the RNS® System (NeuroPace, Inc., Mountain View, CA). Clinical seizures from eight patients (mean follow-up of 10.1 years) were analyzed pre- and post-treatment. Chronic ambulatory electrocorticograms (ECoGs) recorded from PVNHs, hippocampus and neocortex were evaluated to identify the earliest electrographic seizure onset type, pattern of spread, and interictal characteristics. Mean reduction in disabling seizures was 85.7 % (n = 8); seven patients had >50% seizure reduction and two were seizure-free in the final year of analysis. Seizure rate showed a progressive reduction over the course of the study with the highest rate of improvement in the first two to three years after implantation. Four of seven patients with one PVNH lead and a second lead in the hippocampus or neocortex had some electrographic seizures first recorded at either lead location, suggesting two foci or seizure propagation patterns. Low voltage fast type activity was the prominent seizure onset pattern. Interictal ECoG power was lower in PVNH than hippocampus. RNS® System treatment substantially reduced clinical seizure frequency in patients with PVNH. Analysis of ictal ECoG records suggests PVNH may be involved in seizure generation. Chronic ECoG recordings suggest PVNH tissue can actively participate in epileptogenic networks. Direct brain-responsive neurostimulation is a safe and effective treatment option in such patients, progressively reducing seizure rate over a period of years.
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Describe changes in clinical seizure frequency and electrophysiological data recorded in patients with medically-intractable seizures and periventricular nodular heterotopias (PVNH) treated with the RNS® System (NeuroPace, Inc., Mountain View, CA). Clinical seizures from eight patients (mean follow-up of 10.1 years) were analyzed pre- and post-treatment. Chronic ambulatory electrocorticograms (ECoGs) recorded from PVNHs, hippocampus and neocortex were evaluated to identify the earliest electrographic seizure onset type, pattern of spread, and interictal characteristics. Mean reduction in disabling seizures was 85.7 % (n = 8); seven patients had &gt;50% seizure reduction and two were seizure-free in the final year of analysis. Seizure rate showed a progressive reduction over the course of the study with the highest rate of improvement in the first two to three years after implantation. Four of seven patients with one PVNH lead and a second lead in the hippocampus or neocortex had some electrographic seizures first recorded at either lead location, suggesting two foci or seizure propagation patterns. Low voltage fast type activity was the prominent seizure onset pattern. Interictal ECoG power was lower in PVNH than hippocampus. RNS® System treatment substantially reduced clinical seizure frequency in patients with PVNH. Analysis of ictal ECoG records suggests PVNH may be involved in seizure generation. Chronic ECoG recordings suggest PVNH tissue can actively participate in epileptogenic networks. 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Describe changes in clinical seizure frequency and electrophysiological data recorded in patients with medically-intractable seizures and periventricular nodular heterotopias (PVNH) treated with the RNS® System (NeuroPace, Inc., Mountain View, CA). Clinical seizures from eight patients (mean follow-up of 10.1 years) were analyzed pre- and post-treatment. Chronic ambulatory electrocorticograms (ECoGs) recorded from PVNHs, hippocampus and neocortex were evaluated to identify the earliest electrographic seizure onset type, pattern of spread, and interictal characteristics. Mean reduction in disabling seizures was 85.7 % (n = 8); seven patients had &gt;50% seizure reduction and two were seizure-free in the final year of analysis. Seizure rate showed a progressive reduction over the course of the study with the highest rate of improvement in the first two to three years after implantation. 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subjects Adult
Aged
Brain Waves
Brain-responsive neurostimulation
Deep Brain Stimulation - adverse effects
Deep Brain Stimulation - instrumentation
Deep Brain Stimulation - methods
Drug Resistant Epilepsy - complications
Drug Resistant Epilepsy - physiopathology
Drug Resistant Epilepsy - therapy
Female
Focal seizures
Hippocampus - physiopathology
Humans
Male
Medically-intractable epilepsy
Middle Aged
Neocortex - physiopathology
Periventricular nodular heterotopia (PVNH)
Periventricular Nodular Heterotopia - complications
Periventricular Nodular Heterotopia - physiopathology
RNS® System
title Treatment of drug-resistant epilepsy in patients with periventricular nodular heterotopia using RNS® System: Efficacy and description of chronic electrophysiological recordings
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