Seizures and syncope: anatomic basis and diagnostic considerations.
Although pathophysiologically distinct, syncope and seizures share clinical characteristics which may make diagnosis difficult. Adding to diagnostic complexity are the facts that seizures and syncope may coexist in the same patient, syncope may be associated with seizure-like motor manifestations, and seizures may be complicated by cardiac arrhythmia and syncope. Combined EEG/ECG telemetry is sometimes necessary to establish the correct diagnosis. These techniques also provide an opportunity to study the role of certain cortical regions in the modulation of cardiac function. There is an increasing understanding of the central autonomic pathways involved in the genesis of the cardiovascular changes that occur during epileptic seizures. This article reviews the use of EEG/ECG telemetry in the evaluation of syncope and seizures, and the neuroanatomic circuitry involved in the production of the cardiovascular manifestations of seizures.
Sections of Epilepsy and Clinical Neurophysiology/EEG, Dept. of Neurology, West 8 Mayo Building, Mayo Clinic Rochester, 200 First Street SW, Rochester, MN 55905, USA. britton.jeffrey@mayo.edu.
Jeffrey W
JW
Britton
Eduardo
E
Benarroch
D000369:Aged, 80 and over; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000503:physiopathology; D001341:Autonomic Nervous System / Q000503:physiopathology; D001919:Bradycardia / Q000175:diagnosis / Q000503:physiopathology; D001921:Brain / Q000098:blood supply; D002319:Cardiovascular System / Q000503:physiopathology; D002540:Cerebral Cortex / Q000503:physiopathology; D003645:Death, Sudden / Q000209:etiology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D004569:Electroencephalography; D004827:Epilepsy / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology*; D005260:Female; D006321:Heart / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D019462:Syncope, Vasovagal / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology*