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Related Concept Videos

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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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 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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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.
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

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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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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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The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
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Multiple Interrelated Right Atrial Flutters.

Gregory M Marcus1

  • 1Division of Cardiology, Electrophysiology Section, University of California, 500 Parnassus, MUE 434, San Francisco, CA 94143-1354, USA.

Cardiac Electrophysiology Clinics
|August 4, 2017
PubMed
Summary
This summary is machine-generated.

This case study discusses an 82-year-old man with typical cavotricuspid isthmus-dependent atrial flutter. Electrophysiology revealed four interrelated atrial flutter circuits, highlighting complex arrhythmia mechanisms.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Atrial flutter is a common supraventricular tachycardia.
  • Typical atrial flutter involves a circuit around the tricuspid valve, known as the cavotricuspid isthmus.
  • Understanding the mechanisms of atrial flutter is crucial for effective treatment.

Purpose of the Study:

  • To present a unique case of a patient with multiple, interrelated atrial flutter circuits.
  • To discuss the diagnostic findings during an electrophysiology study.
  • To contribute to the understanding of complex atrial flutter mechanisms.

Main Methods:

  • A 12-lead electrocardiogram (ECG) was performed.
  • An invasive electrophysiology study (EPS) was conducted.
  • Analysis of intracardiac electrograms and mapping of atrial circuits were performed.

Main Results:

  • The ECG suggested a typical cavotricuspid isthmus-dependent atrial flutter.
  • During the EPS, four distinct atrial flutter circuits were identified.
  • These flutters were considered to be interrelated, suggesting a complex underlying mechanism.

Conclusions:

  • This case demonstrates the potential for multiple, interconnected atrial flutter circuits in a single patient.
  • Electrophysiology study is essential for differentiating and understanding complex atrial flutter mechanisms.
  • Further research may elucidate the relationship between different atrial flutter circuits.