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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.
891
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,...
193
Sleep Apnea01:21

Sleep Apnea

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Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
128
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

907
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...
907
Decreased pulse rate01:14

Decreased pulse rate

534
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
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Other Pulmonary Disorders01:17

Other Pulmonary Disorders

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Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
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Related Experiment Video

Updated: Jun 6, 2025

Author Spotlight: Utilizing Traditional Chinese Acupuncture of the Ear to Improve Sleep Disorders
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Sleep-Disordered Breathing and Cardiac Arrhythmias.

Tushar Menon1, Ikechukwu Ogbu1, Dinesh K Kalra1

  • 1Division of Cardiology, Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA.

Journal of Clinical Medicine
|November 27, 2024
PubMed
Summary

Sleep-disordered breathing significantly increases the risk of cardiac arrhythmias, including atrial fibrillation and ventricular tachycardia. Continuous positive airway pressure (CPAP) therapy effectively reduces these risks, improving cardiovascular health.

Keywords:
atrial fibrillationbradyarrhythmiacentral sleep apnea (CSA)continuous positive airway pressure (CPAP)obstructive sleep apnea (OSA)sleep-disordered breathing (SDB)sudden cardiac death (SCD)ventricular arrhythmias (VA)

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Pulmonology

Background:

  • Sleep-disordered breathing (SDB) is increasingly recognized for its association with cardiovascular complications.
  • Mechanistic links involve intermittent hypoxia, autonomic imbalance, and intrathoracic pressure swings.

Purpose of the Study:

  • To review and synthesize the mechanistic links between SDB and cardiac arrhythmias.
  • To evaluate the impact of SDB on various types of arrhythmias.
  • To assess the efficacy of continuous positive airway pressure (CPAP) therapy in managing SDB-related arrhythmias.

Main Methods:

  • A narrative review of peer-reviewed articles from major databases (PubMed, EMBASE, Scopus, Web of Science).
  • Analysis of data from key trials like DREAM and CESAAR.
  • Meta-analysis of findings related to SDB and arrhythmia risks, and CPAP efficacy.

Main Results:

  • SDB more than doubles the risk of overall arrhythmias (OR 2.24) and quadruples the risk of atrial fibrillation (AF) (OR 4.02).
  • SDB increases the risk of non-sustained ventricular tachycardia (NSVT) and bradyarrhythmias (OR 2.50).
  • CPAP therapy significantly reduces AF recurrence (42%) and ventricular arrhythmia (VA) incidence (58%), and may decrease bradyarrhythmia occurrences.

Conclusions:

  • SDB is a significant, modifiable risk factor for cardiac arrhythmias.
  • Early diagnosis and management of SDB, particularly with CPAP, are crucial for improving cardiovascular outcomes.
  • CPAP therapy demonstrates substantial benefits in mitigating SDB-associated cardiac electrical disturbances.