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Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.5K
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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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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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...
801
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

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

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

1.0K
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,...
1.0K
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

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Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
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Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication
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Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication

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[Alcohol and arrhythmias].

D Pfeiffer1, D Jurisch2, M Neef2

  • 1Abt. Kardiologie & Angiologie, Department für Innere Medizin, Neurologie und Dermatologie, Universität Leipzig, Liebigstr. 20, 04103, Leipzig, Deutschland. pfeid@medizin.uni-leipzig.de.

Herz
|September 2, 2016
PubMed
Summary
This summary is machine-generated.

Alcohol consumption dose-dependently affects arrhythmia risk, impacting even healthy individuals. While low intake may offer some cardiovascular protection, heavy drinking significantly elevates risks for serious cardiac events and strokes.

Keywords:
Alcoholic cardiomyopathyAlcoholismAtrial fibrillationCardiac arrhythmiasHoliday heart syndrome

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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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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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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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Area of Science:

  • Cardiology
  • Toxicology
  • Public Health

Background:

  • Alcohol consumption is a widespread behavior with complex cardiovascular implications.
  • The relationship between alcohol intake and cardiac arrhythmias, including atrial fibrillation and sudden cardiac death, is not fully elucidated.
  • Existing cardiovascular conditions and sex influence alcohol's arrhythmogenic potential.

Purpose of the Study:

  • To investigate the dose-dependent effects of alcohol on the induction of cardiac arrhythmias.
  • To explore the association between alcohol consumption levels and specific cardiovascular events like atrial fibrillation, sudden cardiac death, and stroke.
  • To identify potential sex-based differences in alcohol-induced arrhythmias.

Main Methods:

  • Review and synthesis of existing literature on alcohol consumption and cardiovascular outcomes.
  • Analysis of dose-response relationships between alcohol intake and arrhythmia incidence.
  • Examination of alcohol's impact on individuals with and without pre-existing cardiovascular diseases.

Main Results:

  • Alcohol's arrhythmogenic effects are dose-dependent and can affect healthy individuals.
  • Atrial fibrillation risk escalates with alcohol dosage, while sudden cardiac death is more prevalent in heavy drinkers with alcoholic cardiomyopathy.
  • Lower alcohol consumption (<10 g/day) may offer cardiovascular protection, but higher doses increase risks for hemorrhagic stroke and subarachnoid hemorrhage. Women are susceptible at lower doses than men.

Conclusions:

  • Alcohol exerts complex, dose-dependent cardiovascular effects, ranging from potential protection at low doses to significant arrhythmia and stroke risks at higher intakes.
  • Abstinence remains the primary recommendation for managing alcohol-related arrhythmias, as specific therapeutic alternatives are not established.
  • Understanding these dose-dependent and sex-specific effects is crucial for public health guidance on alcohol consumption and cardiovascular health.