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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

229
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...
229
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

291
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...
291
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

184
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...
184
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

248
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...
248
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

540
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
540
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

288
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...
288

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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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Differentiating wide complex tachycardias: A historical perspective.

Anthony H Kashou1, Christopher M Evenson2, Peter A Noseworthy3

  • 1Department of Medicine, Mayo Clinic, Rochester, MN, USA.

Indian Heart Journal
|March 14, 2021
PubMed
Summary
This summary is machine-generated.

Differentiating wide complex tachycardias, such as ventricular tachycardia and supraventricular tachycardia, is crucial for patient outcomes. This review analyzes various electrocardiographic methods for accurate diagnosis.

Keywords:
ElectrocardiogramSupraventricular tachycardiaSupraventricular wide complex tachycardiaVentricular tachycardiaWide complex tachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Distinguishing wide complex tachycardias (WCT) into ventricular tachycardia (VT) or supraventricular tachycardia (SVT) is a critical clinical skill.
  • Accurate differentiation of WCT impacts immediate and long-term patient management and outcomes.

Purpose of the Study:

  • To provide an in-depth analysis of current methods for differentiating WCT.
  • To review the existing literature on electrocardiographic criteria and algorithms for diagnosing VT versus SVT.

Main Methods:

  • Retrospective literature review spanning several decades.
  • Analysis of established electrocardiographic criteria and diagnostic algorithms.

Main Results:

  • Multiple electrocardiographic criteria and algorithms exist for WCT differentiation.
  • No single method guarantees absolute diagnostic certainty for VT versus SVT.

Conclusions:

  • Accurate differentiation of WCT remains challenging despite available diagnostic tools.
  • A comprehensive understanding of various methods is essential for effective clinical decision-making in WCT management.