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Updated: Jun 18, 2026

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits
Published on: March 27, 2021
Recording respiratory parameters in patients with epilepsy
1Jules Thorn Telemetry Unit, The National Hospital for Neurology and Neurosurgery, Queen Square, London, England.
Respiratory changes, including apnea, are common during seizures. Central apnea, observed in all generalized and many complex partial seizures, may significantly contribute to sudden unexpected death in epilepsy (SUDEP).
Area of Science:
- Neurology
- Cardiorespiratory Physiology
Background:
- Respiratory alterations are observed in complex partial and generalized seizures.
- Understanding these changes can enhance insights into sudden unexpected death in epilepsy (SUDEP).
Purpose of the Study:
- To document and analyze respiratory parameters during seizures.
- To correlate cardiorespiratory events with electroencephalograms (EEGs) and electrocardiograms (ECGs).
Main Methods:
- Recorded respiratory effort, airflow, and oxygen saturation.
- Utilized time-locked audio-video EEGs and ECGs.
- Analyzed data from 79 seizures in 37 patients.
Main Results:
- Tachycardia was a frequent ictal event; bradycardia was rare and often followed apnea.
- Apnea occurred in 100% of generalized seizures and 39% of complex partial seizures.
- Central apnea (mean duration 29s) was predominant.
Conclusions:
- Central apnea is a significant ictal event potentially predisposing to SUDEP.
- Comprehensive cardiorespiratory monitoring during seizures provides crucial physiological data.
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