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Related Concept Videos

Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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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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Electrophysiology of Normal Cardiac Rhythm01:19

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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

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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,...
277
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

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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 IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

13
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...
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Related Experiment Video

Updated: Aug 6, 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

Published on: August 30, 2024

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Can body position be arrhythmogenic?

Jlpm Maarten van den Broek1, Samaneh Heydari2, Zhuozhao Zhan2

  • 1Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands; Department of Electrical Engineering, Eindhoven University of Technology, the Netherlands.

Sleep Medicine
|March 20, 2023
PubMed
Summary
This summary is machine-generated.

Body position significantly impacts atrial ectopy in patients with high rates of these arrhythmias. Specific resting positions like left or right decubital, or supine, increase atrial ectopy occurrence.

Keywords:
Atrial ectopic beatBody positionEctopic atrial tachycardiaListSleep

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Medical Technology

Background:

  • Palpitations are often linked to body position, yet research on positional effects on arrhythmia is limited.
  • Resting body position may influence pro-arrhythmogenic effects through mechanisms like altered atrial dimensions.

Purpose of the Study:

  • To investigate the relationship between resting body position and atrial ectopy.
  • To determine if specific sleep stages or body positions affect the rate of atrial ectopy.

Main Methods:

  • Observational study using overnight polysomnography (PSG) recordings from a sleep clinic.
  • Analysis of atrial ectopy in relation to sleep stage and body position using a generalized linear mixed-effects model.
  • Inclusion of respiratory events in the analysis for patients with high atrial ectopy rates.

Main Results:

  • In patients with high atrial ectopy rates, body position significantly affected ectopy occurrence.
  • Specific positions like left/right decubital or supine showed significantly higher atrial ectopy.
  • Respiratory events influenced atrial ectopy in a limited number of patients and positions.

Conclusions:

  • Atrial ectopy occurrence is linked to resting body position in selected patients with high ectopy rates.
  • Potential mechanisms include atrial wall stretch and obstructive respiratory events in positional sleep apnea.
  • Patients may avoid symptomatic positions, which is a key limitation to consider.