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Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

2.2K
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...
2.2K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.5K
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.
1.5K
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

597
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,...
597
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

293
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...
293
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

224
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
224
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

402
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...
402

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Related Experiment Video

Updated: Dec 5, 2025

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

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[COVID-19 and arrhythmias].

L Fiorina1, S Younsi1, J Horvilleur1

  • 1Ramsay Santé, Institut Cardiovasculaire Paris Sud, hôpital privé Jacques-Cartier, 6, avenue du Noyer-Lambert, 91300 Massy, France.

Annales De Cardiologie Et D'Angeiologie
|October 21, 2020
PubMed
Summary

The SARS-CoV-2 virus can cause various arrhythmias, including atrial fibrillation and ventricular tachycardia, potentially leading to fatal outcomes. Long-term cardiac rhythm monitoring after COVID-19 infection requires further investigation.

Keywords:
ArrythmiaArythmieCOVID-19Montres ECGMyocarditeMyocarditisSmartwatch ECG

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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
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Area of Science:

  • Cardiology
  • Infectious Diseases
  • Virology

Background:

  • While not initially prominent, SARS-CoV-2 (COVID-19) exhibits cardiac tropism, affecting multiple organs.
  • Emerging evidence indicates a significant incidence of cardiac arrhythmias in COVID-19 patients.
  • The full spectrum of cardiac involvement and long-term consequences remains under investigation.

Purpose of the Study:

  • To summarize the current understanding of arrhythmias associated with SARS-CoV-2 infection.
  • To highlight the types and potential severity of cardiac rhythm disturbances observed.
  • To identify knowledge gaps regarding medium and long-term cardiac monitoring post-infection.

Main Methods:

  • Review of published case series and clinical observations concerning COVID-19 and cardiac arrhythmias.
  • Analysis of reported arrhythmia types, including supraventricular and ventricular disorders.
  • Discussion of potential etiological factors and clinical implications.

Main Results:

  • COVID-19 is associated with a notable proportion of arrhythmias, some life-threatening.
  • Common arrhythmias include atrial fibrillation (AF), atrial flutter, ventricular tachycardias (VT), and ventricular fibrillation (VF).
  • Less frequent but severe arrhythmias like Torsades de Pointes (TdP) have also been reported.

Conclusions:

  • SARS-CoV-2 infection can precipitate a range of cardiac arrhythmias due to multiorgan damage and drug interactions.
  • The potential for medium and long-term rhythm disorders following COVID-19 necessitates further research and monitoring strategies.