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

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

313
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...
313
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

607
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,...
607
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

289
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...
289
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
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

355
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
355

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Related Experiment Video

Updated: Dec 11, 2025

Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding
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Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding

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Arrhythmia in COVID-19.

Savalan Babapoor-Farrokhran1, Roozbeh Tarighati Rasekhi2, Deanna Gill3

  • 1Department of Medicine, Division of Cardiology, Einstein Medical Center, 5501 Old York Road, Philadelphia, PA 19141 USA.

SN Comprehensive Clinical Medicine
|August 25, 2020
PubMed
Summary

COVID-19 (coronavirus disease 2019) can cause cardiac complications, including arrhythmias. Myocardial inflammation from SARS-CoV-2 (severe acute respiratory syndrome coronavirus-2) infection may lead to heart rhythm disturbances.

Keywords:
ArrhythmiasAtrial fibrillationCoronavirus disease 2019Middle east respiratory syndromeQT prolongationSevere acute respiratory syndromeSinus bradycardiaSinus tachycardiaTorsade de pointesVentricular arrhythmiasVentricular fibrillationVentricular tachycardiaViral infection

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Area of Science:

  • Cardiology
  • Infectious Diseases
  • Virology

Background:

  • The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) pandemic has led to widespread health concerns.
  • Cardiac complications are increasingly recognized in patients with coronavirus disease 2019 (COVID-19).
  • Arrhythmias represent a significant cardiac manifestation of COVID-19.

Purpose of the Study:

  • To review the current understanding of arrhythmia manifestations in COVID-19 patients.
  • To explore the potential mechanisms linking SARS-CoV-2 infection to cardiac arrhythmias.
  • To consolidate knowledge on the electrophysiological impact of COVID-19 on the heart.

Main Methods:

  • Literature review of studies on COVID-19 and cardiac complications.
  • Analysis of reported cases and clinical data regarding arrhythmias in COVID-19.
  • Synthesis of evidence on myocardial inflammation and cardiac remodeling in SARS-CoV-2 infection.

Main Results:

  • COVID-19 is associated with various cardiac complications, including myocarditis, heart failure, and acute coronary syndromes.
  • Arrhythmias are a prominent complication, observed in patients with and without pre-existing cardiovascular disease.
  • Viral-induced myocardial inflammation and subsequent remodeling are proposed mechanisms for arrhythmia development.

Conclusions:

  • Arrhythmias are a significant concern in the context of COVID-19.
  • Understanding the mechanisms of SARS-CoV-2-related arrhythmias is crucial for patient management.
  • Further research is needed to fully elucidate the link between COVID-19 and cardiac electrophysiology.