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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...
307
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

383
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...
383
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

378
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...
378
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

2.3K
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...
350
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

239
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...
239

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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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A single-loop macroreentrant biatrial flutter identified by the Rhythmia mapping system.

Chengye Di1, Weiye Huang2, Mingming Wang3

  • 1Cardiac Electrophysiology Department, First Department of Cardiology, TEDA International Cardiovascular Hospital, Tianjin, China.

Journal of Electrocardiology
|April 28, 2020
PubMed
Summary
This summary is machine-generated.

This study details a rare case of biatrial flutter involving the perimitral annulus, Bachmann's bundle, and coronary sinus. Understanding this specific reentrant circuit led to successful patient treatment.

Keywords:
Atrial flutterBiatrialMacro reentryRhythmiaSingle loop

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Atrial flutter can arise from complex reentrant circuits.
  • Understanding the specific anatomical pathways is crucial for effective treatment.
  • Macro-reentrant atrial flutter mechanisms require detailed investigation.

Observation:

  • A rare case of counterclockwise single-loop macro-reentrant biatrial flutter was observed.
  • The reentrant circuit involved the perimitral annulus, Bachmann's bundle, and coronary sinus ostium.
  • Conduction across the atrial septum via Bachmann's bundle was identified despite a blocked left atrial line.

Findings:

  • Ultrahigh-resolution mapping revealed interatrial conduction pathways.
  • Bachmann's bundle and the coronary sinus ostium were critical components of the reentrant circuit.
  • The specific mechanism of this biatrial flutter was elucidated.

Implications:

  • Accurate identification of reentrant circuits is key to treating complex atrial arrhythmias.
  • This case highlights the importance of Bachmann's bundle in interatrial conduction.
  • Successful treatment was achieved by understanding and targeting the identified flutter mechanism.