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Related Concept Videos

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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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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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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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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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

364
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...
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

292
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...
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Related Experiment Video

Updated: Dec 14, 2025

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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Brugada syndrome.

Haarika Korlipara1, Giridhar Korlipara2, Srinivas Pentyala1

  • 1Department of Anesthesiology.

Acta Cardiologica
|July 21, 2020
PubMed
Summary
This summary is machine-generated.

Brugada syndrome (BrS) is an inherited heart condition increasing sudden cardiac death risk. Fever, like from COVID-19, can unmask BrS, requiring prompt fever management and ECG monitoring.

Keywords:
Brugada syndromeCovid-19channel mutationsmisdiagnosisrisk stratification

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Area of Science:

  • Cardiology
  • Genetics
  • Electrophysiology

Background:

  • Brugada syndrome (BrS) is a genetic cardiac arrhythmia linked to sudden cardiac death.
  • Characterized by specific ECG abnormalities, its prevalence varies globally, higher in males and Southeast Asia.
  • Genetic underpinnings involve multiple variants, suggesting polygenic inheritance.

Purpose of the Study:

  • To review current knowledge on Brugada syndrome.
  • Focus on epidemiology, pathophysiology, genetics, diagnosis, risk stratification, and treatment.
  • Highlight the impact of COVID-19 on BrS presentation and management.

Main Methods:

  • Literature review summarizing existing research on Brugada syndrome.
  • Analysis of diagnostic criteria, including ECG findings and drug provocation tests.
  • Examination of therapeutic strategies and risk assessment tools.

Main Results:

  • Diagnosis relies on ECG patterns, with ongoing debate on risk stratification methods.
  • Implantable cardioverter defibrillators (ICDs) are primary treatment, with catheter ablation as an alternative.
  • Fever, including from COVID-19, can unmask BrS, necessitating fever control and monitoring.

Conclusions:

  • Brugada syndrome management requires a comprehensive approach considering genetics, ECG, and risk factors.
  • COVID-19 highlights the importance of monitoring fever in susceptible individuals.
  • Further research is needed for refined risk stratification and treatment optimization.