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Related Concept Videos

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...
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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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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...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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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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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Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Related Experiment Video

Updated: Mar 21, 2026

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
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Catecholaminergic Polymorphic Ventricular Tachycardia.

Krystien V Lieve1, Christian van der Werf, Arthur A Wilde

  • 1Heart Centre, Department of Clinical and Experimental Cardiology, Academic Medical Centre.

Circulation Journal : Official Journal of the Japanese Circulation Society
|May 17, 2016
PubMed
Summary
This summary is machine-generated.

Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inherited heart condition causing dangerous arrhythmias and sudden cardiac death. Recent advancements improve diagnosis and treatment, offering vital hope for affected individuals.

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Area of Science:

  • Cardiology
  • Genetics
  • Clinical Medicine

Background:

  • Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a significant inherited cardiac arrhythmia.
  • It is a leading cause of sudden cardiac death (SCD) in young individuals.
  • Early recognition and effective treatment are crucial for managing CPVT.

Purpose of the Study:

  • To review the clinical characteristics, genetics, and diagnostic strategies for CPVT.
  • To summarize current therapeutic approaches and recent advancements in CPVT management.
  • To highlight ongoing challenges in the field of CPVT.

Main Methods:

  • This review synthesizes information from existing literature on CPVT.
  • It covers clinical presentations, genetic underpinnings, and diagnostic modalities.
  • Therapeutic strategies and recent research findings are discussed.

Main Results:

  • CPVT is characterized by exercise- or emotion-induced polymorphic ventricular arrhythmias.
  • Genetic factors play a key role in the pathophysiology of CPVT.
  • Significant progress has been made in diagnostic and therapeutic interventions.

Conclusions:

  • CPVT requires vigilant recognition and management due to its association with SCD.
  • Advances in diagnostics and therapeutics have improved patient outcomes.
  • Continued research is necessary to address remaining challenges in CPVT care.