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Related Concept Videos

Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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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...
766
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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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...
674
Increased pulse rate01:17

Increased pulse rate

1.5K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
1.5K
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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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...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

2.6K
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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Related Experiment Video

Updated: Mar 25, 2026

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

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Ventricular Tachycardias.

Henry H Hsia1

  • 1Arrhythmia Service, VA San Francisco, Building 203, Room 2A-52A, MC 111C-6, 4150 Clement Street, San Francisco, CA 94121, USA.

Cardiac Electrophysiology Clinics
|February 28, 2016
PubMed
Summary
This summary is machine-generated.

Challenging ventricular tachyarrhythmia cases are presented to improve diagnosis and treatment strategies. This monograph explores electrocardiographic features, mapping, and ablation techniques for better patient outcomes.

Keywords:
Electroanatomical substrateElectrocardiographic localization and anatomyElectrophysiology mappingVentricular tachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Education

Background:

  • Ventricular tachyarrhythmia (VT) significantly contributes to mortality and morbidity.
  • Implantable cardioverter-defibrillators (ICDs) reduce arrhythmic death but can increase mortality and decrease quality of life.
  • Antiarrhythmic drugs pose risks of adverse effects and non-cardiac mortality.

Purpose of the Study:

  • To present challenging case scenarios in ventricular tachyarrhythmia management.
  • To highlight critical diagnostic and therapeutic considerations in VT ablation.
  • To serve as an educational resource for clinicians managing complex VT.

Main Methods:

  • Case-based learning approach focusing on electrocardiographic and anatomic features.
  • Detailed illustration of diagnostic maneuvers and mapping techniques.
  • Integration of imaging modalities and ablation strategy formulation.

Main Results:

  • Emphasis on critical decision-making in complex VT cases.
  • Demonstration of advanced mapping and ablation techniques.
  • Discussion of integrating various diagnostic tools for effective VT management.

Conclusions:

  • Catheter ablation is an effective intervention for ventricular tachyarrhythmia in diverse patient populations.
  • Mastery of electrocardiographic interpretation, mapping, and ablation strategies is crucial for successful VT treatment.
  • This case-based monograph provides valuable insights for optimizing VT management and improving patient care.