Incidence and Types of Cardiac Arrhythmias in the Peri-Ictal Period in Patients Having a Generalized Convulsive Seizure
View abstract on PubMed
Summary
This summary is machine-generated.Generalized convulsive seizures (GCSs) can cause cardiac arrhythmias, increasing sudden unexpected death in epilepsy (SUDEP) risk. Seizure-induced exaggerated sinus arrhythmia with bradycardia (ESAWB) and bradycardia were more common in SUDEP cases, suggesting potential biomarkers.
Area Of Science
- Cardiology
- Neurology
- Epilepsy Research
Background
- Generalized convulsive seizures (GCSs) are a primary risk factor for sudden unexpected death in epilepsy (SUDEP).
- The link between GCSs, cardiac arrhythmias, and SUDEP pathophysiology, particularly concerning seizure severity markers, remains unclear.
- Understanding GCS-induced cardiac arrhythmias is crucial for SUDEP prevention and management.
Purpose Of The Study
- To investigate the incidence of cardiac arrhythmias during generalized convulsive seizures (GCSs).
- To analyze the association between these arrhythmias and electroclinical features or seizure severity biomarkers.
- To determine the occurrence of these arrhythmias in patients who died of sudden unexpected death in epilepsy (SUDEP).
Main Methods
- An observational, prospective, multicenter study involving adult epilepsy patients undergoing video-EEG monitoring.
- Analysis of semiologic and cardiorespiratory features using VEEG, ECG, and pulse oximetry.
- Classification of arrhythmias, with a focus on those relevant to SUDEP pathophysiology, and follow-up for SUDEP cases.
Main Results
- Exaggerated sinus arrhythmia (ESA) was the most common arrhythmia (35.9% of seizures).
- Arrhythmias of interest occurred in 20.1% of patients, with exaggerated sinus arrhythmia with bradycardia (ESAWB) and supraventricular tachycardia (SVT) being most frequent.
- Seizure-induced bradycardia and ESAWB were significantly over-represented in SUDEP cases compared to survivors.
Conclusions
- Seizure severity markers do not correlate with seizure-induced arrhythmias of interest.
- Occult cardiac abnormalities may play a role in the occurrence of these arrhythmias.
- ESAWB and bradycardia warrant further investigation as potential SUDEP biomarkers, though based on limited SUDEP patient data.
Related Concept Videos
Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Focal aware seizures: In these seizures, the person remains conscious...
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...

