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Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

1.1K
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...
1.1K
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.
1.0K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

64
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...
64
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

29
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...
29
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

281
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,...
281
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

19
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...
19

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Related Experiment Video

Updated: Aug 8, 2025

Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication
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Alcohol and Arrhythmias.

Christopher X Wong1, Samuel J Tu2, Gregory M Marcus3

  • 1Department of Electrophysiology, Division of Cardiology, University of California-San Francisco, San Francisco, California, USA; Centre for Heart Rhythm Disorders (CHRD), University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia.

JACC. Clinical Electrophysiology
|March 1, 2023
PubMed
Summary
This summary is machine-generated.

Excessive alcohol intake increases risks for atrial fibrillation (AF) and sudden cardiac death (SCD). This review explores alcohol

Keywords:
alcoholatrial fibrillationbradyarrhythmiasconduction diseasesudden cardiac deathventricular arrhythmias

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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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Construction of Vapor Chambers Used to Expose Mice to Alcohol During the Equivalent of all Three Trimesters of Human Development
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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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Construction of Vapor Chambers Used to Expose Mice to Alcohol During the Equivalent of all Three Trimesters of Human Development
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Area of Science:

  • Cardiology
  • Electrophysiology
  • Public Health

Background:

  • Alcohol consumption is linked to heart rhythm abnormalities.
  • Excessive intake raises risks for atrial fibrillation (AF) and sudden cardiac death (SCD).
  • Mechanisms underlying alcohol's pro-arrhythmic effects require further elucidation.

Purpose of the Study:

  • To review the spectrum of heart rhythm disorders associated with alcohol consumption.
  • To discuss current epidemiologic and experimental evidence on alcohol and arrhythmias.
  • To address uncertainties regarding safe consumption levels and beverage-specific risks.

Main Methods:

  • Literature review of epidemiologic and experimental studies.
  • Analysis of data on alcohol consumption and cardiac arrhythmias.
  • Synthesis of information on beverage type, ingredients, and definitions.

Main Results:

  • Alcohol is associated with various heart rate and rhythm abnormalities.
  • Atrial fibrillation and sudden cardiac death are key concerns with excessive intake.
  • Uncertainty persists regarding thresholds for harm and other arrhythmia links.

Conclusions:

  • Alcohol's impact on cardiac electrophysiology is complex and dose-dependent.
  • Further research is needed to clarify safe consumption limits and specific risks.
  • Standardized definitions and recommendations are crucial for public health guidance.