Semin Neurol 2008; 28(5): 668-681
DOI: 10.1055/s-0028-1105978
© Thieme Medical Publishers

Seizures and Status Epilepticus in the Intensive Care Unit

Wendy C. Ziai1 , 2 , 3 , Peter W. Kaplan1
  • 1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
  • 2Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
  • 3Department of Anesthesia and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
Further Information

Publication History

Publication Date:
29 December 2008 (online)

ABSTRACT

Persistent seizures and failure to regain consciousness following witnessed seizure activity require emergency neurological consultation. Although outcome is largely dependent on underlying cause, early maximal anticonvulsant therapy is critical to reducing morbidity. This review covers important concepts in the clinical and EEG diagnosis of status epilepticus, and discusses treatment algorithms for single and recurrent seizures, emphasizing the need to rationalize therapy depending on the presumed duration of seizure activity. The review takes the perspective of the neurological consultant in the intensive care unit, and considers all pharmacological approaches available to the intensivist as described in the current literature and from clinical experience.

REFERENCES

  • 1 Bleck T P, Smith M C, Pierre-Louis S J, Jares J J, Murray J, Hansen C A. Neurologic complications of critical medical illnesses.  Crit Care Med. 1993;  21(1) 98-103
  • 2 Varelas P N, Mirski M A. Seizures in the adult intensive care unit.  J Neurosurg Anesthesiol. 2001;  13(2) 163-175
  • 3 Lowenstein D H, Alldredge B K. Status epilepticus at an urban public hospital in the 1980s.  Neurology. 1993;  43 483-488
  • 4 Aminoff M J, Simon R P. Status epilepticus: causes, clinical features and consequences in 98 patients.  Am J Med. 1980;  69 657-666
  • 5 Barry E, Hauser W A. Status epilepticus: the interaction of epilepsy and acute brain disease.  Neurology. 1993;  43 1473-1478
  • 6 Delanty N, French J A, Labar D R et al.. Status epilepticus arising de novo in hospitalized patients: an analysis of 41 patients.  Seizure. 2001;  10 116-119
  • 7 DeLorenzo R J, Hauser W A, Towne A R et al.. A prospective, population-based epidemiologic study of status epilepticus in Richmond, Virginia.  Neurology. 1996;  46 1029-1035
  • 8 Towne A R, Waterhouse E J, Boggs J G et al.. Prevalence of nonconvulsive status epilepticus in comatose patients.  Neurology. 2000;  54 340-345
  • 9 Jordan K G. Continuous EEG and evoked potential monitoring in the neuroscience intensive care unit.  J Clin Neurophysiol. 1993;  10 445-475
  • 10 Ozuna J. Seizure disorders and epilepsy.  Lippincotts Prim Care Pract. 2000;  4(6) 608-618
  • 11 Lowenstein D H, Bleck T, Macdonald R L. It's time to revise the definition of status epilepticus.  Epilepsia. 1999;  40 120-122
  • 12 Gastaut H. Classification of status epilepticus. In: Delgado-Escueta AV, Wasterlain CG, Treiman DM, Porter RJ Status Epilepticus. New York; Raven Press 1983: 15-35
  • 13 Fagan K J, Lee S I. Prolonged confusion following convulsions due to generalized nonconvulsive status epilepticus.  Neurology. 1990;  40 1689-1694
  • 14 Mikati M A, Lee W L, DeLong G R. Protracted epileptiform encephalopathy: an unusual form of partial complex status epilepticus.  Epilepsia. 1985;  26 563-571
  • 15 Kaplan P W. Nonconvulsive status epilepticus.  Semin Neurol. 1996;  16 33-40
  • 16 Abou Khaled K J, Hirsch L J. Updates in the management of seizures and status epilepticus in critically ill patients.  Neurol Clin. 2008;  26 385-408
  • 17 Kaplan P W. Behavioral manifestations of nonconvulsive status epilepticus.  Epilepsy Behav. 2002;  3 122-139
  • 18 Kaplan P W. Nonconvulsive status epilepticus in the emergency room.  Epilepsia. 1996;  37 643-650
  • 19 Dunne J W, Summers Q A, Stewart–Wynne E G. Nonconvulsive status epilepticus: a prospective study in an adult general hospital.  Q J Med. 1987;  62 117-126
  • 20 Arif H, Hirsch L J. Treatment of status epilepticus.  Semin Neurol. 2008;  28(3) 342-354
  • 21 Thomas P, Beaumanoir A, Genton P et al.. “De novo” absence status of late onset: report of 11 cases.  Neurology. 1992;  42 104-110
  • 22 Kaplan P W. Nonconvulsive status in the elderly.  Epilepsia. 1998;  39(suppl 6) 122
  • 23 Kaplan PW Neurologic Disease in Women. New York; Demos Medical Publishing 1998
  • 24 Kaplan P W. Assessing the outcomes in patients with nonconvulsive status epilepticus: nonconvulsive status epilepticus is underdiagnosed, potentially overtreated, and confounded by comorbidity.  J Clin Neurophysiol. 1999;  16 341-352
  • 25 Shneker B F, Fountain N B. Assessment of acute morbidity and mortality in nonconvulsive status epilepticus.  Neurology. 2003;  61 1066-1073
  • 26 Granner M A, Lee S I. Nonconvulsive status epilepticus: EEG analysis of a large series.  Epilepsia. 1994;  35 42-47
  • 27 Young G B, Goodenough P, Jacono V, Schieven J R. Periodic lateralized epileptiform discharges (PLEDs): electrographic and clinical features.  Am J EEG Technol. 1988;  28 1-13
  • 28 Young G B, Jordan K G, Doig G S. An assessment of nonconvulsive seizures in the intensive care unit using continuous EEG monitoring: an investigation of variables associated with mortality.  Neurology. 1996;  47 83-89
  • 29 Brenner R P, Schaul N. Periodic EEG patterns: classification, clinical correlation, and pathophysiology.  J Clin Neurophysiol. 1990;  7(2) 249-267
  • 30 Chatrian G E, Shaw C M, Leffman H. The significance of periodic lateralized epileptiform discharges in EEG: an electrographic, clinical and pathological study.  Electroencephalogr Clin Neurophysiol. 1964;  17 177-193
  • 31 Snodgrass S M, Tsuburaya K, Ajmone-Marsan C. Clinical significance of periodic lateralized epileptiform discharges: relationship with status epilepticus.  J Clin Neurophysiol. 1989;  6 159-172
  • 32 de la Paz D, Brenner R P. Bilateral independent periodic lateralized epileptiform discharges.  Arch Neurol. 1981;  38 713-715
  • 33 Reiher J, Rivest J, Grand-Maison F, Leduc C P. Periodic lateralized epileptiform discharges with transitional rhythmic discharges: association with seizures.  Electroencephalogr Clin Neurophysiol. 1991;  78 12-17
  • 34 Husain A M, Mebust K A, Radtke R A. Generalized periodic epileptiform discharges: etiologies, relationship to status epilepticus, and prognosis.  J Clin Neurophysiol. 1999;  16 51-58
  • 35 Yemisci M, Gurer G, Saygi S, Ciger A. Generalized periodic epileptiform discharges: clinical features, neuroradiological evaluation and prognosis in 37 adult patients.  Seizure. 2003;  12 465-472
  • 36 Hirsch L J, Claassen J, Mayer S A, Emerson R G. Stimulus-induced rhythmic periodic or ictal discharges (SIRPIDs): a common EEG phenomenon in the critically ill.  Epilepsia. 2004;  45 109-123
  • 37 Gross D W, Wiebe S, Blume W T. The periodicity of lateralized epileptiform discharges.  Clin Neurophysiol. 1999;  110 1516-1520
  • 38 Pohlmann-Eden B, Hoch D B, Cochius J I, Chiappa K H. Periodic lateralized epileptiform discharges: a critical review.  J Clin Neurophysiol. 1996;  13 519-530
  • 39 Garzon E, Fernandes R MF, Sakamoto A C. Serial EEG during human status epilepticus: evidence for PLED as an ictal pattern.  Neurology. 2001;  57 1175-1183
  • 40 Nagata K, Tagawa K, Hiroi S, Shishido F, Uemura K. Electroencephalographic correlates of blood flow and oxygen metabolism provided by positron emission tomography in patients with cerebral infarction.  Electroencephalogr Clin Neurophysiol. 1989;  72 16-30
  • 41 Theodore W H, Newmark M E, Sato S et al.. (18-F) Fluorodeoxy glucose positron emission tomography in refractory complex partial seizures.  Ann Neurol. 1983;  14 429-437
  • 42 Chong D J, Hirsch L J. Which EEG patterns warrant treatment in the critically ill? Reviewing the evidence for treatment of periodic epileptiform discharges and related patterns.  J Clin Neurophysiol. 2005;  22 79-91
  • 43 Boulanger J M, Deacon C, Lecuyer D, Gosselin S, Reiher J. Triphasic waves versus nonconvulsive status epilepticus: EEG distinction.  Can J Neurol Sci. 2006;  33 175-180
  • 44 Nousiainen U, Suomalainen T, Mervaala E. Clinical benefits of scalp EEG studies in intractable seizure disorders.  Acta Neurol Scand. 1992;  85 181-186
  • 45 Lesser R P, Lueders H, Dinner D S. Evidence for epilepsy is rare in patients with psychogenic seizures.  Neurology. 1983;  33 502-504
  • 46 Howell S JL, Owen L, Chadwick D W. Pseudostatus epilepticus.  Q J Med. 1989;  71 507-519
  • 47 Reuber M, Enright S M, Goulding P J. Postoperative pseudostatus: not everything that shakes is epilepsy.  Anaesthesia. 2000;  55(1) 74-78
  • 48 Treiman D M, Meyers P D, Walton N Y et al.. A comparison of four treatments for generalized convulsive status epilepticus.  N Engl J Med. 1998;  339 792-798
  • 49 Nei M, Lee J M, Shanker V L et al.. The EEG and prognosis in status epilepticus.  Epilepsia. 1999;  40(2) 157-163
  • 50 Privitera M, Hoffman M, Layne J M, Jester D. EEG detection of nontonic-clonic status epilepticus in patients with altered consciousness.  Epilepsy Res. 1994;  18 155-166
  • 51 Thibodeau L G, Ferrera P C. Nonconvulsive status epilepticus.  Am J Emerg Med. 1997;  15(7) 652-653
  • 52 Claassen J, Mayer S A, Kowalski R G et al.. Detection of electrographic seizures with continuous EEG monitoring in critically ill patients.  Neurology. 2004;  62 1743-1748
  • 53 Treatment of convulsive status epilepticus. Recommendations of the Epilepsy Foundation of America's Working Group on Status Epilepticus.  JAMA. 1993;  270(7) 854-859
  • 54 Bleck T P. Management approaches to prolonged seizures and status epilepticus.  Epilepsia. 1999;  40(suppl 1) S59-S63 discussion S64-S66
  • 55 Jordan K G. Status epilepticus: a perspective from the neuroscience intensive care unit.  Neurosurg Clin N Am. 1994;  5(4) 671-686
  • 56 Pellock J M, Marmarou A, DeLorenzo R. Time to treatment in prolonged seizure episodes.  Epilepsy Behav. 2004;  5(2) 192-196
  • 57 Lowenstein D H, Alldredge B K. Status epilepticus at an urban public hospital in the 1980s.  Neurology. 1993;  43(3) 483-488
  • 58 Alldredge B K, Gelb A M, Isaacs S M et al.. A comparison of lorazepam, diazepam, and placebo for the treatment of out-of-hospital status epilepticus.  N Engl J Med. 2001;  345(9) 631-637
  • 59 Appleton R, Sweeney A, Choonara I et al.. Lorazepam versus diazepam in the acute treatment of epileptic seizures and status epilepticus.  Dev Med Child Neurol. 1995;  37 682-688
  • 60 Cock H R, Schapira A H. A comparison of lorazepam and diazepam as initial therapy in convulsive status epilepticus.  Q J Med. 2002;  95 225-231
  • 61 Mayer S A, Claassen J, Lokin J et al.. Refractory status epilepticus: frequency, risk factors, and impact on outcome.  Arch Neurol. 2002;  59 205-210
  • 62 Bauer L A. Interference of oral phenytoin absorption by continuous nasogastric feedings.  Neurology. 1982;  32 570-572
  • 63 Hirsch L J, Claassen J. The current state of treatment of status epilepticus.  Curr Neurol Neurosci Rep. 2002;  2 345-356
  • 64 Agarwal P, Kumar N, Chandra R et al.. Randomized study of intravenous valproate and phenytoin in status epilepticus.  Seizure. 2007;  16(6) 527-532
  • 65 Misra U K, Kalita J, Patel R. Sodium valproate vs phenytoin in status epilepticus: a pilot study.  Neurology. 2006;  67(2) 340-342
  • 66 McNamara J O. Drugs effective in the therapy of the epilepsies. In: Hardman JG, Limbird LE, Gilman AG Goodman & Gilman's The Pharmacologic Basis of Therapeutics. 10th ed. New York, NY; McGraw-Hill 2001: 521-547
  • 67 Giroud M, Gras D, Escousse A et al.. Use of injectable valproic acid in status epilepticus: a pilot study.  Drug Invest. 1993;  5 154-159
  • 68 Raskind J Y, El-Chaar G M. The role of carnitine supplementation during valproic acid therapy.  Ann Pharmacother. 2000;  34 630-638
  • 69 Sztajnkrycer M D. Valproic acid toxicity: overview and management.  J Toxicol Clin Toxicol. 2002;  40(6) 789-801
  • 70 Lheureux P E, Penaloza A, Zahir S, Gris M. Science review: carnitine in the treatment of valproic acid-induced toxicity: what is the evidence?.  Crit Care. 2005;  9(5) 431-440
  • 71 Tiamkao S, Mayurasakorn N, Suko P et al.. Very high dose phenobarbital for refractory status epilepticus.  J Med Assoc Thai. 2007;  90(12) 2597-2600
  • 72 Niespodziany I, Klitgaard H, Margineanu D G. Levetiracetam inhibits the high-voltage-activated Ca2 +  current in pyramidal neurones of rat hippocampal slices.  Neurosci Lett. 2001;  306 5-8
  • 73 Lee C H, Lee C Y, Tsai T S, Liou H H. PKA-mediated phosphorylation is a novel mechanism for levetiracetam, an antiepileptic drug, activating ROMK1 channels.  Biochem Pharmacol. 2008;  76(2) 225-235
  • 74 Knake S, Gruener J, Hatteme K et al.. Intravenous levetiracetam in the treatment of benzodiazepine-refractory status epilepticus.  J Neurol Neurosurg Psychiatry. 2008;  79(5) 588-589
  • 75 Rossetti A O, Bromfield E B. Levetiracetam in the treatment of status epilepticus in adults: a study of 13 episodes.  Eur Neurol. 2005;  54 34-38
  • 76 Rossetti A O, Bromfield E B. Determinants of success in the use of oral levetiracetam in status epilepticus.  Epilepsy Behav. 2006;  8 651-654
  • 77 Patel N C, Landan I R, Levin J, Szaflarski J, Wilner A N. The use of levetiracetam in refractory status epilepticus.  Seizure. 2006;  15(3) 137-141
  • 78 Ramael S, Daoust A, Otoul C et al.. Levetiracetam intravenous infusion: a randomized placebo-controlled safety and pharmacokinetic study.  Epilepsia. 2006;  47 1128-1135
  • 79 Holtkamp M, Othman J, Buchhheim K et al.. Predictors and prognosis of refractory status epilepticus treated in a neurological intensive care unit.  J Neurol Neurosurg Psychiatry. 2005;  76 534-539
  • 80 Rossetti A O, Logroscino G, Bromfield E B. Refractory status epilepticus: effect of treatment aggressiveness on prognosis.  Arch Neurol. 2005;  62 1698-1702
  • 81 Scorza F A, Colugnati D B, Pansani A P, Sonoda E Y, Arida R M, Cavalheiro E A. Preventing tomorrow's sudden cardiac death in epilepsy today: what should physicians know about this?.  Clinics. 2008;  63(3) 389-394
  • 82 Clark L P, Prout T P. Status epilepticus: a clinical and pathological study in epilepsy. (An article in 3 parts).  Am J Insanity. 1903;  60 291-306 60 645-675 61 81-108
  • 83 Chen J W, Naylor D E, Wasterlain C G. Advances in the pathophysiology of status epilepticus.  Acta Neurol Scand Suppl. 2007;  186 7-15
  • 84 Mazarati A M, Wasterlain C G. N-Methyl-D-asparate receptor antagonists abolish the maintenance phase of self-sustaining status epilepticus in rat.  Neurosci Lett. 1999;  265 187-190
  • 85 Wasterlain C G, Mazarati A M, Naylor D et al.. Short-term plasticity of hippocampal neuropeptides and neuronal circuitry in experimental status epilepticus.  Epilepsia. 2002;  43(suppl 5) 20-29
  • 86 Mazarati A M, Baldwin R A, Sankar R, Wasterlain C G. Time-dependent decrease in the effectiveness of antiepileptic drugs during the course of self-sustaining status epilepticus.  Brain Res. 1998;  814 179-185
  • 87 Kapur J, Macdonald R L. Rapid seizure-induced reduction of benzodiazepine and Zn2 + sensitivity of hippocampal dentate granule cell GABAA receptors.  J Neurosci. 1997;  17 7532-7540
  • 88 Wasterlain C G, Liu H, Mazarati A, Baldwin R A. NMDA receptor trafficking during the transition from single seizures to status epilepticus.  Ann Neurol. 2002;  52(suppl 1) S16
  • 89 Bleck T P. Management approaches to prolonged seizures and status epilepticus.  Epilepsia. 1999;  40(suppl 1) S59-S63
  • 90 Claassen J, Hirsch L J, Emerson R G, Mayer S A. Treatment of refractory status epilepticus with pentobarbital, propofol, or midazolam: a systematic review.  Epilepsia. 2002;  43 146-153
  • 91 Wessen A, Persson P M, Nilsson A, Hartvig P. Clinical pharmacokinetics of propofol given as a constant-rate infusion and in combination with epidural blockade.  J Clin Anesth. 1994;  6 193-198
  • 92 Marik P E. Propofol: therapeutic indications and side-effects.  Curr Pharm Des. 2004;  10 3639-3649
  • 93 Holtkamp M. The anaesthetic and intensive care of status epilepticus.  Curr Opin Neurol. 2007;  20 188-193
  • 94 Lowenstein D H, Alldredge B K. Status epilepticus.  N Engl J Med. 1998;  338 970-976
  • 95 Chen J WY, Wasterlain C G. Status epilepticus: pathophysiology and management in adults.  Lancet Neurol. 2006;  5 246-256
  • 96 Finley G A, MacManus B, Sampson S E, Fernandez C V, Retallick R. Delayed seizures following sedation with propofol.  Can J Anaesth. 1993;  40 863-865
  • 97 Kumar M A, Urrutia V C, Thomas C E, Abou-Khaled K J, Schwartzman R J. The syndrome of irreversible acidosis after prolonged propofol infusion.  Neurocrit Care. 2005;  3(3) 257-259
  • 98 Zarovnaya E L, Jobst B C, Harris B T. Propofol-associated fatal myocardial failure and rhabdomyolysis in an adult with status epilepticus.  Epilepsia. 2007;  48(5) 1002-1006
  • 99 Kam P C, Cardone D. Propofol infusion syndrome.  Anaesthesia. 2007;  62(7) 690-701
  • 100 Rossetti A O, Reichhart M D, Schaller M D, Despland P A, Bogousslavsky J. Propofol treatment of refractory status epilepticus: a study of 31 episodes.  Epilepsia. 2004;  45 757-763
  • 101 Rogawski M A, Loscher W. The neurobiology of antiepileptic drugs.  Nat Rev Neurosci. 2004;  5 553-564
  • 102 Humar M, Pischke S E, Loop T et al.. Barbiturates directly inhibit the calmodulin/calcineurin complex: a novel mechanism of inhibition of nuclear factor of activated T cells.  Mol Pharmacol. 2004;  65(2) 350-361
  • 103 Mewasingh L D, Sekhara T, Aeby A et al.. Oral ketamine in paediatric non-convulsive status epilepticus.  Seizure. 2003;  12 483-489
  • 104 Ubogu E E, Sagar S M, Lerner A J et al.. Ketamine for refractory status epilepticus: a case of possible ketamine-induced neurotoxicity.  Epilepsy Behav. 2003;  4 70-75
  • 105 Borris D J, Bertram E H, Kapur J. Ketamine controls prolonged status epilepticus.  Epilepsy Res. 2000;  42 117-122
  • 106 Walker I A, Slovis C M. Lidocaine in the treatment of status epilepticus.  Acad Emerg Med. 1997;  4 918-922
  • 107 Mirsattari S M, Sharpe M D, Young G B. Treatment of refractory status epilepticus with inhalational anesthetic agents isoflurane and desflurane.  Arch Neurol. 2004;  61 1254-1259
  • 108 Kofke W A, Young R S, Davis P et al.. Isoflurane for refractory status epilepticus: a clinical series.  Anesthesiology. 1989;  71 653-659
  • 109 Koblin D D. Characteristics and implications of desflurane metabolism and toxicity.  Anesth Analg. 1992;  75 S10-S16
  • 110 Towne A R, Garnett L K, Waterhouse E J et al.. The use of topiramate in refractory status epilepticus.  Neurology. 2003;  60 332-334
  • 111 Krishnamurthy K B, Drislane F W. Relapse and survival after barbiturate anesthetic treatment of refractory status epilepticus.  Epilepsia. 1996;  37 863-867
  • 112 Holtkamp M, Othman J, Buchheim K, Masuhr F, Schielke E, Meierkord H. A malignant” variant of status epilepticus.  Arch Neurol. 2005;  62(9) 1428-1431
  • 113 Sheth R D, Gidal B E. Refractory status epilepticus: response to ketamine.  Neurology. 1998;  51 1765-1766
  • 114 Prüss H, Holtkamp M. Ketamine successfully terminates malignant status epilepticus.  Epilepsy Res. 2008;  , September 17 (Epub ahead of print)
  • 115 Krumholz A, Sung G Y, Fisher R S et al.. Complex partial status epilepticus accompanied by serious morbidity and mortality.  Neurology. 1995;  45 1499-1504
  • 116 Kaplan P W. Intravenous valproate treatment of generalized nonconvulsive status epilepticus.  Clin Electroencephalogr. 1999;  30 1-4
  • 117 Winston K R, Levisohn P, Miller B R, Freeman J. Vagal nerve stimulation for status epilepticus.  Pediatr Neurosurg. 2001;  34 190-192
  • 118 Bae E H, Schrader L M, Machii K et al.. Safety and tolerability of repetitive transcranial magnetic stimulation in patients with epilepsy: a review of the literature.  Epilepsy Behav. 2007;  10(4) 521-528
  • 119 Carrasco Gonzales M D, Palomar M, Rovira R. Electroconvulsive therapy for status epilepticus.  , [letter] Ann Intern Med. 1997;  127 247-248
  • 120 Lousa M, Sanchez-Alonso S, Rodriguez-Diaz R, Dalmau J. Status epilepticus with neuron-reactive serum antibodies: response to plasma exchange.  Neurology. 2000;  54 2163-2165
  • 121 Gorman D G, Shields W D, Shewmon D A et al.. Neurosurgical treatment of refractory status epilepticus.  Epilepsia. 1992;  33 546-549
  • 122 Corry J J, Dhar R, Murphy T, Diringer M N. Hypothermia for refractory status epilepticus.  Neurocrit Care. 2008;  9(2) 189-197
  • 123 Woodhall B, Sealy W C, Hall K D, Floyd W L. Craniotomy under conditions of quinidine-protected cardioplegia and profound hypothermia.  Ann Surg. 1960;  152 37-44
  • 124 Costello D J, Cole A J. Treatment of acute seizures and status epilepticus.  J Intensive Care Med. 2007;  22(6) 319-347
  • 125 Hesdorffer D C, Logroscino G, Cascino G et al.. Incidence of status epilepticus in Rochester, Minnesota, 1965–1984.  Neurology. 1998;  50 735-741
  • 126 DeLorenzo R J, Hauser W A, Towne A R et al.. A prospective, population-based epidemiologic study of status epilepticus in Richmond, Virginia.  Neurology. 1996;  46 1029-1035
  • 127 Legriel S, Mourvillier B, Bele N et al.. Outcomes in 140 critically ill patients with status epilepticus.  Intensive Care Med. 2008;  34(3) 476-480
  • 128 Towne A R, Pellock J M, Ko D et al.. Determinants of mortality in status epilepticus.  Epilepsia. 1994;  35 27-34
  • 129 Holtkamp M, Othman J, Buchheim K, Meierkord H. Predictors and prognosis of refractory status epilepticus treated in a neurological intensive care unit.  J Neurol Neurosurg Psychiatry. 2005;  76(4) 534-539

Wendy C ZiaiM.D. M.P.H. 

Departments of Neurology, Neurosurgery, and Anesthesia and Critical Care Medicine, The Johns Hopkins Hospital

600 North Wolfe Street, Meyer 8-140, Baltimore, MD 21287

Email: weziai@jhmi.edu

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