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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 IV: Characteristics of Bradyarrhythmias01:18

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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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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.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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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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Dysrhythmias V: Evaluating Dysrhythmias01:30

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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.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...
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Coexistent HCN4 and GATA5 Rare Variants and Atrial Fibrillation in a Large Spanish Family.

The Canadian journal of cardiology·2024
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Executive Summary: European Heart Rhythm Association Consensus Document on the Management of Supraventricular Arrhythmias: Endorsed by Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardiaca y Electrofisiologia (SOLAECE).

Arrhythmia & electrophysiology review·2017
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European Heart Rhythm Association (EHRA) consensus document on the management of supraventricular arrhythmias, endorsed by Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardiaca y Electrofisiologia (SOLAECE).

European heart journal·2016
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European Heart Rhythm Association (EHRA) consensus document on the management of supraventricular arrhythmias, endorsed by Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardiaca y Electrofisiologia (SOLAECE).

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Atrial Flutter, Typical and Atypical: A Review.

Francisco G Cosío1

  • 1Getafe University Hospital, European University of Madrid, Madrid, Spain.

Arrhythmia & Electrophysiology Review
|August 25, 2017
PubMed
Summary

Clinical electrophysiology reclassifies rapid atrial rhythms, identifying diverse re-entrant and focal tachycardia mechanisms. Ablation effectively treats many, but atrial fibrillation risk factors require secondary prevention strategies.

Keywords:
Typical atrial flutteratypical atrial flutterclassification of atrial tachycardiasflutter ablationmacro-re-entrant atrial tachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Traditional classification of rapid atrial rhythms lacks clinical utility.
  • Electrophysiological studies reveal diverse re-entrant and focal tachycardia mechanisms.
  • ECG morphologies and rates vary, guiding ablation of triggers or circuits.

Purpose of the Study:

  • To delineate the clinical utility of electrophysiological studies in classifying and treating rapid atrial rhythms.
  • To evaluate the effectiveness of catheter ablation for different tachycardia mechanisms.
  • To highlight the role of secondary prevention in managing associated atrial fibrillation.

Main Methods:

  • Electrophysiological studies to define tachycardia mechanisms (re-entrant, focal).
  • Catheter ablation to target focal triggers or re-entry circuits.
  • Analysis of ECG patterns and patient history (heart disease, surgery, prior ablation).

Main Results:

  • Typical flutter ECG predicts right atrial re-entry treatable by ablation, though late atrial fibrillation persists.
  • Complex macro-re-entrant and focal mechanisms identified in post-surgical or post-ablation patients.
  • Electrophysiological studies are crucial for guiding ablation in complex cases.

Conclusions:

  • Clinical electrophysiology provides a more precise understanding of rapid atrial rhythms beyond traditional classifications.
  • Catheter ablation is effective for specific tachycardia mechanisms, particularly right atrial re-entry.
  • Secondary prevention targeting atrial fibrillation risk factors is an emerging therapeutic approach.