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Related Concept Videos

Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

133
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
133
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...
1.2K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.0K
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.
1.0K
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

107
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...
107
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

151
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...
151
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

393
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,...
393

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Related Experiment Video

Updated: Sep 3, 2025

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation
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Salt as a Trigger for Atrial Tachycardia/Fibrillation.

Jerome Goddard1, Cori J Speights1, Mark Borganelli2

  • 1Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Starkville, USA.

Cureus
|July 27, 2022
PubMed
Summary

High salt intake may trigger atrial tachycardia/atrial fibrillation (AT/AF) independently of hypertension. This case study identified salt as a significant predictor of AT/AF events in one patient.

Keywords:
atrial fibrillationatrial tachycardiasaltstretch-induced arrhythmiastriggers

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Nutritional Science

Background:

  • Atrial fibrillation (AF) and atrial tachycardia (AT) can be triggered by various factors, including diet, lifestyle, and stress.
  • Gastrointestinal factors, such as food intake and bloating, are recognized as potential vagal triggers for AF.

Observation:

  • This case report details dietary and behavioral factors in a single patient experiencing paroxysmal AT/AF.
  • Data on seven potential triggers, including vagal factors, were collected using a Medtronic loop recorder.
  • Episodes of AT/AF were analyzed by a cardiac electrophysiologist.

Findings:

  • Statistical analysis using a general linear model and stepwise selection identified salt intake and polyethylene glycol 3350 use as predictors of AT/AF.
  • High salt intake was the sole factor significantly associated with AT/AF onset (P < 0.05).

Implications:

  • Dietary salt intake may be a direct trigger for AT/AF, potentially acting through mechanisms other than hypertension.
  • Further research into the relationship between salt consumption and cardiac arrhythmias is warranted.
  • Personalized dietary interventions may help manage AT/AF in susceptible individuals.