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Kardiale und zerebrovaskuläre Erkrankungen bei Epilepsie

Ursachen, Zusammenhänge und Folgen

Cardiac and cerebrovascular diseases in epilepsy

Causes, associations and consequences

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Zusammenfassung

Kardiovaskuläre Risikofaktoren sind bei Epilepsiepatienten weit verbreitet und prädisponieren zu zerebrovaskulären Erkrankungen und vaskulär bedingten Epilepsien. Umgekehrt können Epilepsien und Antikonvulsiva einen negativen Einfluss auf das kardiovaskuläre Risiko haben. Insbesondere der Einsatz enzyminduzierender Antikonvulsiva kann Dyslipidämien, Übergewicht oder Hyperhomozysteinämien verursachen oder verstärken. Kardiovaskuläre Erkrankungen können Epilepsien oder akut-symptomatische Anfälle bedingen, z. B. durch Hirninfarkte, Hirnblutungen, zerebrale Hypoxien und hypertensive Krisen. Die allgemeine und kardiovaskuläre Mortalität ist bei Menschen mit Epilepsie erhöht. Sie erleiden im Vergleich zur Allgemeinbevölkerung häufiger und früher Schlaganfälle, Herzinfarkte und einen plötzlichen Herztod. Epileptische Anfälle können zu Störungen der koronaren Durchblutung, Herzmuskelmechanik und des Herzrhythmus führen. Die kardiale Belastung durch Anfälle findet ihren Ausdruck in EKG-Veränderungen und Troponin-Erhöhungen. Herzrhythmusstörungen sind eine häufige Folge epileptischer Anfälle. Iktale und postiktale Tachykardien sind häufig, diagnostisch nützlich und nur selten gefährlich. Iktale Bradykardien und Asystolien können typischerweise selbstlimitierende Synkopen auslösen, postiktale Asystolien enden hingegen unbehandelt nicht selten tödlich. Synkopen sind die häufigste Differenzialdiagnose zu epileptischen Anfällen. Antikonvulsiva und in sehr seltenen Fällen auch die Vagusnervstimulation können arrhythmogene Wirkungen entfalten, hier ist daher insbesondere bei herzkranken Patienten Vorsicht geboten.

Abstract

People with epilepsy commonly display cardiovascular risk factors which predispose to cerebrovascular diseases and vascular-linked epilepsies. Conversely, epilepsies and anticonvulsant drugs can have negative effects on cardiovascular risks. In particular, enzyme-inducing anticonvulsant drugs may cause or worsen dyslipidemia, overweight or hyperhomocysteinemia. Cardiovascular diseases may cause epilepsies and acute symptomatic seizures, e.g. by ischemic or hemorrhagic stroke, cerebral hypoxia and hypertensive crises. Cardiovascular and total mortality are both elevated in people with epilepsy. They suffer from stroke, heart attacks and sudden cardiac death more frequently and at younger ages than the general population. Epileptic seizures can lead to disturbances of coronary blood flow, heart muscle mechanics and cardiac rhythm. The cardiac stress of seizures is reflected by ECG changes and troponin increases. Cardiac arrhythmias are a frequent consequence of epileptic seizures. Ictal and postictal tachycardias are common, diagnostically useful and rarely dangerous. Ictal bradycardia and asystole can trigger usually self-limiting syncope, while postictal asystole may lead to death. Syncope is the most common differential diagnosis to epileptic seizures. Anticonvulsants and more rarely vagal nerve stimulation can have arrhythmogenic effects. Caution is advised, especially in patients with heart disease.

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Correspondence to Robert D. Nass.

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C.E. Elger hat in den letzten 5 Jahren Honorare für Vorträge oder als Berater von Cyberonics, Desitin, Eisai, Medtronics, Novartis, Pfizer, UCB Pharma erhalten. R. Surges hat in den letzten 5 Jahren Honorare für Vorträge oder als Berater von Bial, Cyberonics, Desitin, Eisai, LivaNova, Novartis und UCB Pharma erhalten, und R.D. Nass gibt an, dass kein Interessenkonflikt besteht.

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Nass, R.D., Elger, C.E. & Surges, R. Kardiale und zerebrovaskuläre Erkrankungen bei Epilepsie. Z. Epileptol. 31, 48–57 (2018). https://doi.org/10.1007/s10309-017-0146-x

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