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Related Concept Videos

Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

916
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...
916
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

24
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.1. Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
24
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

3
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...
3
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

3
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...
3
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

3
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...
3
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

899
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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Updated: Jun 12, 2025

Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding
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Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding

Published on: August 30, 2024

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Arrhythmic Risk Stratification-General Considerations in Specific Scenarios.

Marisa Varrenti1, Patrizio Mazzone1

  • 1De Gasperis Cardio Center, Niguarda Hospital, 20126 Milan, Italy.

Journal of Cardiovascular Development and Disease
|September 27, 2024
PubMed
Summary

Stratifying arrhythmic risk in cardiomyopathy patients is complex. This study addresses challenges in predicting dangerous heart rhythms across various cardiac conditions.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Genetics

Background:

  • Arrhythmic risk stratification is difficult in diverse cardiomyopathies, including post-ischemic, non-ischemic, and systemic diseases.
  • Managing patients with neuromuscular disorders and infiltrative diseases poses unique challenges for predicting cardiac arrhythmias.

Discussion:

  • Current risk stratification methods may not adequately address the heterogeneity of cardiomyopathies.
  • Integrating genetic and advanced imaging may improve risk assessment for sudden cardiac death.

Key Insights:

  • Identifying specific biomarkers and risk factors is crucial for personalized arrhythmic risk management.
  • A multi-modal approach is needed to accurately stratify risk in complex cardiomyopathies.

Outlook:

  • Future research should focus on developing novel risk prediction models tailored to specific cardiomyopathy subtypes.
  • Improved risk stratification can lead to timely interventions and better patient outcomes in managing cardiac arrhythmias.