Abstract
Clinical seizures occur frequently in the critically ill patient. In addition, the increasing application and recent widespread use of continuous electroencephalogram monitoring have revealed that electrographic seizures are even more frequent than clinical seizures in the critically ill patient. There are limited data on how electrographic seizures affect outcome and whether and how aggressively to treat electrographic seizures in the critically ill patient. This review aims to address this gap in knowledge by summarizing the impact of electrographic seizures on outcome and providing a general guide to treat electrographic seizures in the critically ill patient. Current literature suggests that electrographic seizures likely worsen outcome independent of the underlying etiology. This association is stronger in subarachnoid hemorrhage and in traumatic brain injury and warrants a proactive treatment. In contrast, the presence of electrographic seizures in stroke or tumors is unlikely to modify outcomes.
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Claassen J, Mayer SA, Kowalski RG, Emerson RG, Hirsch LJ. Detection of electrographic seizures with continuous EEG monitoring in critically ill patients. Neurology. 2004;62:1743–8.
Abend NS, Arndt DH, Carpenter JL, et al. Electrographic seizures in pediatric ICU patients: cohort study of risk factors and mortality. Neurology. 2013;81:383–91.
Glass HC, Glidden D, Jeremy RJ, Barkovich AJ, Ferriero DM, Miller SP. Clinical neonatal seizures are independently associated with outcome in infants at risk for hypoxic-ischemic brain injury. J Pediatr. 2009;155:318–23.
Lambrechtsen FA, Buchhalter JR. Aborted and refractory status epilepticus in children: a comparative analysis. Epilepsia. 2008;49:615–25.
McBride MC, Laroia N, Guillet R. Electrographic seizures in neonates correlate with poor neurodevelopmental outcome. Neurology. 2000;55:506–13.
Pisani F, Cerminara C, Fusco C, Sisti L. Neonatal status epilepticus vs recurrent neonatal seizures: clinical findings and outcome. Neurology. 2007;69:2177–85.
Gwer S, Idro R, Fegan G, et al. Continuous EEG monitoring in Kenyan children with non-traumatic coma. Arch Dis Child. 2012;97:343–9.
Payne ET, Zhao XY, Frndova H, et al. Seizure burden is independently associated with short term outcome in critically ill children. Brain. 2014;137:1429–38.
Topjian AA, Gutierrez-Colina AM, Sanchez SM, et al. Electrographic status epilepticus is associated with mortality and worse short-term outcome in critically ill children. Crit Care Med. 2013;41:215–23.
Claassen J, Albers D, Schmidt JM, et al. Nonconvulsive seizures in subarachnoid hemorrhage link inflammation and outcome. Ann Neurol. 2014;75:771–81.
Foreman B, Claassen J, Abou Khaled K, et al. Generalized periodic discharges in the critically ill: a case-control study of 200 patients. Neurology. 2012;79:1951–60.
Oddo M, Carrera E, Claassen J, Mayer SA, Hirsch LJ. Continuous electroencephalography in the medical intensive care unit. Crit Care Med. 2009;37:2051–6.
Ney JP, van der Goes DN, Nuwer MR, Nelson L, Eccher MA. Continuous and routine EEG in intensive care: utilization and outcomes, United States 2005–2009. Neurology. 2013;81:2002–8.
Sanchez SM, Carpenter J, Chapman KE, et al. Pediatric ICU EEG monitoring: current resources and practice in the United States and Canada. J Clin Neurophysiol. 2013;30:156–60.
Gavvala J, Abend N, LaRoche S, et al. Continuous EEG monitoring: a survey of neurophysiologists and neurointensivists. Epilepsia. 2014;55:1864–71.
Gutierrez-Colina AM, Topjian AA, Dlugos DJ, Abend NS. Electroencephalogram monitoring in critically ill children: indications and strategies. Pediatr Neurol. 2012;46:158–61.
Yang A, Arndt DH, Berg RA, et al. Development and validation of a seizure prediction model in critically ill children. Seizure. 2015;25:104–11.
Abend NS, Topjian AA, Williams S. How much does it cost to identify a critically ill child experiencing electrographic seizures? J Clin Neurophysiol. 2015;32:257–64.
Young GB, Jordan KG, Doig GS. An assessment of nonconvulsive seizures in the intensive care unit using continuous EEG monitoring: an investigation of variables associated with mortality. Neurology. 1996;47:83–9.
Abend NS, Topjian AA, Williams S. Could EEG monitoring in critically ill children be a cost-effective neuroprotective strategy? J Clin Neurophysiol. 2015;32:486–94.
Abend NS, Wusthoff CJ, Goldberg EM, Dlugos DJ. Electrographic seizures and status epilepticus in critically ill children and neonates with encephalopathy. Lancet Neurol. 2013;12:1170–9.
Lynch NE, Stevenson NJ, Livingstone V, Murphy BP, Rennie JM, Boylan GB. The temporal evolution of electrographic seizure burden in neonatal hypoxic ischemic encephalopathy. Epilepsia. 2012;53:549–57.
Tsuchida TN, Wusthoff CJ, Shellhaas RA, et al. American clinical neurophysiology society standardized EEG terminology and categorization for the description of continuous EEG monitoring in neonates: report of the American Clinical Neurophysiology Society critical care monitoring committee. J Clin Neurophysiol. 2013;30:161–73.
Alldredge BK, Gelb AM, Isaacs SM, et al. A comparison of lorazepam, diazepam, and placebo for the treatment of out-of-hospital status epilepticus. N Engl J Med. 2001;345:631–7.
Tobochnik S, Gutierrez C, Jacobson MP. Characteristics and acute outcomes of ICU patients with initial presentation of seizure. Seizure. 2015;26:94–7.
Abend NS, Dlugos DJ, Hahn CD, Hirsch LJ, Herman ST. Use of EEG monitoring and management of non-convulsive seizures in critically ill patients: a survey of neurologists. Neurocrit Care. 2010;12:382–9.
O'Connor KL, Westover MB, Phillips MT, et al. High risk for seizures following subarachnoid hemorrhage regardless of referral bias. Neurocrit Care. 2014;21:476–82.
Hosokawa K, Gaspard N, Su F, Oddo M, Vincent JL, Taccone FS. Clinical neurophysiological assessment of sepsis-associated brain dysfunction: a systematic review. Crit Care. 2014;18:674.
Polito A, Eischwald F, Maho AL, et al. Pattern of brain injury in the acute setting of human septic shock. Crit Care. 2013;17:R204.
Kurtz P, Gaspard N, Wahl AS, et al. Continuous electroencephalography in a surgical intensive care unit. Intensive Care Med. 2014;40:228–34.
Vespa PM, Nuwer MR, Nenov V, et al. Increased incidence and impact of nonconvulsive and convulsive seizures after traumatic brain injury as detected by continuous electroencephalographic monitoring. J Neurosurg. 1999;91:750–60.
Arndt DH, Lerner JT, Matsumoto JH, et al. Subclinical early posttraumatic seizures detected by continuous EEG monitoring in a consecutive pediatric cohort. Epilepsia. 2013;54:1780–8.
O'Neill BR, Handler MH, Tong S, Chapman KE. Incidence of seizures on continuous EEG monitoring following traumatic brain injury in children. J Neurosurg Pediatr. 2015;16:167–76.
Vespa PM, McArthur DL, Xu Y, et al. Nonconvulsive seizures after traumatic brain injury are associated with hippocampal atrophy. Neurology. 2010;75:792–8.
Cantu D, Walker K, Andresen L, et al. Traumatic brain injury increases cortical glutamate network activity by compromising gabaergic control. Cereb Cortex. 2015;25:2306–20.
Vespa P, Prins M, Ronne-Engstrom E, et al. Increase in extracellular glutamate caused by reduced cerebral perfusion pressure and seizures after human traumatic brain injury: a microdialysis study. J Neurosurg. 1998;89:971–82.
Vespa PM, Miller C, McArthur D, et al. Nonconvulsive electrographic seizures after traumatic brain injury result in a delayed, prolonged increase in intracranial pressure and metabolic crisis. Crit Care Med. 2007;35:2830–6.
Vespa P, Tubi M, Claassen J, et al. Metabolic crisis occurs with seizures and periodic discharges after brain trauma. Ann Neurol. 2016;79:579–90.
Thompson K, Pohlmann-Eden B, Campbell LA, Abel H. Pharmacological treatments for preventing epilepsy following traumatic head injury. Cochrane Database Syst Rev. 2015;8:CD009900.
De Marchis GM, Pugin D, Meyers E, et al. Seizure burden in subarachnoid hemorrhage associated with functional and cognitive outcome. Neurology. 2016;86:253–60.
Riazi K, Galic MA, Kuzmiski JB, Ho W, Sharkey KA, Pittman QJ. Microglial activation and TNFalpha production mediate altered CNS excitability following peripheral inflammation. Proc Natl Acad Sci U S A. 2008;105:17151–6.
Greenhalgh AD, Brough D, Robinson EM, Girard S, Rothwell NJ, Allan SM. Interleukin-1 receptor antagonist is beneficial after subarachnoid haemorrhage in rat by blocking haem-driven inflammatory pathology. Dis Model Mech. 2012;5:823–33.
Claassen J, Hirsch LJ, Frontera JA, et al. Prognostic significance of continuous EEG monitoring in patients with poor-grade subarachnoid hemorrhage. Neurocrit Care. 2006;4:103–12.
Claassen J, Hirsch LJ, Kreiter KT, et al. Quantitative continuous EEG for detecting delayed cerebral ischemia in patients with poor-grade subarachnoid hemorrhage. Clin Neurophysiol. 2004;115:2699–710.
Szaflarski JP, Rackley AY, Kleindorfer DO, et al. Incidence of seizures in the acute phase of stroke: a population-based study. Epilepsia. 2008;49:974–81.
Vespa PM, O'Phelan K, Shah M, et al. Acute seizures after intracerebral hemorrhage: a factor in progressive midline shift and outcome. Neurology. 2003;60:1441–6.
Passero S, Rocchi R, Rossi S, Ulivelli M, Vatti G. Seizures after spontaneous supratentorial intracerebral hemorrhage. Epilepsia. 2002;43:1175–80.
Claassen J, Jette N, Chum F, et al. Electrographic seizures and periodic discharges after intracerebral hemorrhage. Neurology. 2007;69:1356–65.
Leira R, Davalos A, Silva Y, et al. Early neurologic deterioration in intracerebral hemorrhage: predictors and associated factors. Neurology. 2004;63:461–7.
Bladin CF, Alexandrov AV, Bellavance A, et al. Seizures after stroke: a prospective multicenter study. Arch Neurol. 2000;57:1617–22.
Camilo O, Goldstein LB. Seizures and epilepsy after ischemic stroke. Stroke. 2004;35:1769–75.
Garrett MC, Komotar RJ, Starke RM, Merkow MB, Otten ML, Connolly ES. Predictors of seizure onset after intracerebral hemorrhage and the role of long-term antiepileptic therapy. J Crit Care. 2009;24:335–9.
Messe SR, Sansing LH, Cucchiara BL, et al. Prophylactic antiepileptic drug use is associated with poor outcome following ICH. Neurocrit Care. 2009;11:38–44.
Waterhouse EJ, Vaughan JK, Barnes TY, et al. Synergistic effect of status epilepticus and ischemic brain injury on mortality. Epilepsy Res. 1998;29:175–83.
Goldstone AB, Bronster DJ, Anyanwu AC, et al. Predictors and outcomes of seizures after cardiac surgery: a multivariable analysis of 2,578 patients. Ann Thorac Surg. 2011;91:514–8.
Gofton TE, Chu MW, Norton L, et al. A prospective observational study of seizures after cardiac surgery using continuous EEG monitoring. Neurocrit Care. 2014;21:220–7.
Young GB, Sharpe MD, Savard M, Al Thenayan E, Norton L, Davies-Schinkel C. Seizure detection with a commercially available bedside EEG monitor and the subhairline montage. Neurocrit Care. 2009;11:411–6.
Naim MY, Gaynor JW, Chen J, et al. Subclinical seizures identified by postoperative electroencephalographic monitoring are common after neonatal cardiac surgery. J Thorac Cardiovasc Surg. 2015;150:169–78. discussion 178-180
Gaynor JW, Jarvik GP, Bernbaum J, et al. The relationship of postoperative electrographic seizures to neurodevelopmental outcome at 1 year of age after neonatal and infant cardiac surgery. J Thorac Cardiovasc Surg. 2006;131:181–9.
Marcuse LV, Bronster DJ, Fields M, Polanco A, Yu T, Chikwe J. Evaluating the obtunded patient after cardiac surgery: the role of continuous electroencephalography. J Crit Care. 2014;29:316.e1–5.
Chen J, Zimmerman RA, Jarvik GP, et al. Perioperative stroke in infants undergoing open heart operations for congenital heart disease. Ann Thorac Surg. 2009;88:823–9.
Domi T, Edgell DS, McCrindle BW, et al. Frequency, predictors, and neurologic outcomes of vaso-occlusive strokes associated with cardiac surgery in children. Pediatrics. 2008;122:1292–8.
Rittenberger JC, Popescu A, Brenner RP, Guyette FX, Callaway CW. Frequency and timing of nonconvulsive status epilepticus in comatose post-cardiac arrest subjects treated with hypothermia. Neurocrit Care. 2012;16:114–22.
Abend NS, Topjian A, Ichord R, et al. Electroencephalographic monitoring during hypothermia after pediatric cardiac arrest. Neurology. 2009;72:1931–40.
Legriel S, Hilly-Ginoux J, Resche-Rigon M, et al. Prognostic value of electrographic postanoxic status epilepticus in comatose cardiac-arrest survivors in the therapeutic hypothermia era. Resuscitation. 2013;84:343–50.
Cloostermans MC, van Meulen FB, Eertman CJ, Hom HW, van Putten MJ. Continuous electroencephalography monitoring for early prediction of neurological outcome in postanoxic patients after cardiac arrest: a prospective cohort study. Crit Care Med. 2012;40:2867–75.
Friberg H, Westhall E, Rosen I, Rundgren M, Nielsen N, Cronberg T. Clinical review: continuous and simplified electroencephalography to monitor brain recovery after cardiac arrest. Crit Care. 2013;17:233.
Rundgren M, Westhall E, Cronberg T, Rosen I, Friberg H. Continuous amplitude-integrated electroencephalogram predicts outcome in hypothermia-treated cardiac arrest patients. Crit Care Med. 2010;38:1838–44.
Accardo J, De Lisi D, Lazzerini P, Primavera A. Good functional outcome after prolonged postanoxic comatose myoclonic status epilepticus in a patient who had undergone bone marrow transplantation. Case Rep Neurol Med. 2013;2013:872127.
Hovland A, Nielsen EW, Kluver J, Salvesen R. EEG should be performed during induced hypothermia. Resuscitation. 2006;68:143–6.
Kaplan PW, Morales Y. Re: Status epilepticus: an independent outcome predictor after cerebral anoxia. Neurology. 2008;70:1295. author reply 1295–1296
Lucas JM, Cocchi MN, Salciccioli J, et al. Neurologic recovery after therapeutic hypothermia in patients with post-cardiac arrest myoclonus. Resuscitation. 2012;83:265–9.
Rossetti AO, Oddo M, Liaudet L, Kaplan PW. Predictors of awakening from postanoxic status epilepticus after therapeutic hypothermia. Neurology. 2009;72:744–9.
Rossetti AO, Oddo M, Logroscino G, Kaplan PW. Prognostication after cardiac arrest and hypothermia: a prospective study. Ann Neurol. 2010;67:301–7.
Ruijter BJ, van Putten MJ, Hofmeijer J. Generalized epileptiform discharges in postanoxic encephalopathy: quantitative characterization in relation to outcome. Epilepsia. 2015;56:1845–54.
Seder DB, Sunde K, Rubertsson S, et al. Neurologic outcomes and postresuscitation care of patients with myoclonus following cardiac arrest. Crit Care Med. 2015;43:965–72.
Sunde K, Dunlop O, Rostrup M, Sandberg M, Sjoholm H, Jacobsen D. Determination of prognosis after cardiac arrest may be more difficult after introduction of therapeutic hypothermia. Resuscitation. 2006;69:29–32.
Westhall E, Rundgren M, Lilja G, Friberg H, Cronberg T. Postanoxic status epilepticus can be identified and treatment guided successfully by continuous electroencephalography. Ther Hypothermia Temp Manag. 2013;3:84–7.
Ko SB, Ortega-Gutierrez S, Choi HA, et al. Status epilepticus-induced hyperemia and brain tissue hypoxia after cardiac arrest. Arch Neurol. 2011;68:1323–6.
Lote K, Stenwig AE, Skullerud K, Hirschberg H. Prevalence and prognostic significance of epilepsy in patients with gliomas. Eur J Cancer. 1998;34:98–102.
Chang EF, Potts MB, Keles GE, et al. Seizure characteristics and control following resection in 332 patients with low-grade gliomas. J Neurosurg. 2008;108:227–35.
Spindler M, Jacks LM, Chen X, Panageas K, DeAngelis LM, Avila EK. Spectrum of nonconvulsive status epilepticus in patients with cancer. J Clin Neurophysiol. 2013;30:339–43.
Abend NS, Gutierrez-Colina AM, Topjian AA, et al. Nonconvulsive seizures are common in critically ill children. Neurology. 2011;76:1071–7.
Hosain SA, Solomon GE, Kobylarz EJ. Electroencephalographic patterns in unresponsive pediatric patients. Pediatr Neurol. 2005;32:162–5.
Jette N, Claassen J, Emerson RG, Hirsch LJ. Frequency and predictors of nonconvulsive seizures during continuous electroencephalographic monitoring in critically ill children. Arch Neurol. 2006;63:1750–5.
Saengpattrachai M, Sharma R, Hunjan A, et al. Nonconvulsive seizures in the pediatric intensive care unit: etiology, EEG, and brain imaging findings. Epilepsia. 2006;47:1510–8.
Shahwan A, Bailey C, Shekerdemian L, Harvey AS. The prevalence of seizures in comatose children in the pediatric intensive care unit: a prospective video-EEG study. Epilepsia. 2010;51:1198–204.
Kirkham FJ, Wade AM, McElduff F, et al. Seizures in 204 comatose children: incidence and outcome. Intensive Care Med. 2012;38:853–62.
Glass HC, Nash KB, Bonifacio SL, et al. Seizures and magnetic resonance imaging-detected brain injury in newborns cooled for hypoxic-ischemic encephalopathy. J Pediatr. 2011;159:731–5. e731
Wyatt JS, Gluckman PD, Liu PY, et al. Determinants of outcomes after head cooling for neonatal encephalopathy. Pediatrics. 2007;119:912–21.
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Sánchez Fernández, I., Loddenkemper, T. (2017). Impact of Seizures on Outcome. In: Varelas, P., Claassen, J. (eds) Seizures in Critical Care. Current Clinical Neurology. Humana Press, Cham. https://doi.org/10.1007/978-3-319-49557-6_2
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