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Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias III: Characteristics of Dysrhythmias

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 minute.

Dysrhythmias II: Classification of Tachyarrhythmias

Dysrhythmias II: Classification of Tachyarrhythmias

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...

Mechanism of Cardiac Arrhythmias

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.

Disturbances in Heart Rhythm

Disturbances in Heart Rhythm

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...

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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...

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

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

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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Cardiac Arrhythmias - Part III Narrow Complex Tachycardia.

M D O'Neill¹, D W Davies

¹Department of Cardiology, St. Mary's Hospital NHS Trust, London W2 1NY, United Kingdom.

|June 10, 2011

Summary

This article focuses on diagnosing and managing regular, narrow complex tachycardia, excluding atrial fibrillation. It covers common causes like sinus tachycardia, atrial flutter, and AVNRT/AVRT for effective patient care.

Area of Science:

Cardiology
Electrophysiology
Internal Medicine

Background:

Narrow complex tachycardia involves abnormalities in the heart's electrical system, originating from the sinus node, atria, or AV node.
While atrial fibrillation is common, "supraventricular tachycardia" typically denotes other rhythm disturbances.
This article specifically addresses regular, narrow complex tachycardias, excluding atrial fibrillation.

Purpose of the Study:

To provide a focused overview of the diagnosis and acute management of common causes of regular, narrow complex tachycardia.
To differentiate these tachycardias from atrial fibrillation for clearer clinical focus.
To aid healthcare professionals in identifying and treating these specific arrhythmias.

Main Methods:

Review of established diagnostic criteria for various narrow complex tachycardias.

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Discussion of acute management strategies based on current clinical guidelines.

Exclusion of atrial fibrillation from the scope of the presented information.

Main Results:

Identification of key features differentiating various narrow complex tachycardias.
Outline of immediate treatment options for patients presenting with these arrhythmias.
Emphasis on the importance of accurate diagnosis for effective intervention.

Conclusions:

Accurate diagnosis of narrow complex tachycardia is crucial for appropriate acute management.
Understanding the specific types of supraventricular tachycardia discussed is essential for clinical practice.
This focused approach aids in managing patients with regular, narrow complex tachycardias effectively.