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Related Concept Videos

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
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Disturbances in Heart Rhythm01:29

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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 heart...
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Mechanism of Cardiac Arrhythmias01:28

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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.
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Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

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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,...
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Ictal Cardiac Ryhthym Abnormalities.

Rushna Ali1

  • 1Henry Ford Hospital, Department of Neurosurgery, 2799 West Grand Blvd. Detroit, MI 48202, USA.

The Open Cardiovascular Medicine Journal
|June 28, 2016
PubMed
Summary
This summary is machine-generated.

Cardiac arrhythmias are common in epilepsy but often missed. Effective seizure control is crucial for preventing sudden unexpected death in epilepsy (SUDEP), especially with frequent generalized tonic-clonic seizures.

Keywords:
Bradycardiacardiac arrestepilepsysudden unexplained death in epilepsy (SUDEP)

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Area of Science:

  • Neurology
  • Cardiology
  • Epileptology

Background:

  • Cardiac rhythm abnormalities are frequently associated with epilepsy but often underdiagnosed.
  • The underlying mechanisms linking seizures to cardiac events remain incompletely understood.

Purpose of the Study:

  • To highlight the significance of cardiac rhythm abnormalities in epilepsy.
  • To discuss the pathophysiology and risk factors for sudden unexpected death in epilepsy (SUDEP).
  • To emphasize the importance of seizure control in SUDEP prevention.

Main Methods:

  • Review of existing literature on epilepsy-associated cardiac events and SUDEP.
  • Analysis of proposed pathophysiological pathways involving the insula and amygdala.
  • Identification of key risk factors for SUDEP.

Main Results:

  • Seizure onset can precede bradycardia and asystole, suggesting ictal propagation impacting autonomic function.
  • Frequent generalized tonic-clonic seizures (GTC) are the most consistent risk factor for SUDEP.
  • Polytherapy and prolonged epilepsy duration are also associated with increased SUDEP risk.

Conclusions:

  • Effective seizure control is paramount for SUDEP prevention in patients with chronic generalized epilepsy.
  • Increased frequency of GTC seizures necessitates vigilant monitoring and management.
  • Further research into the pathophysiology is needed to improve patient outcomes.