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Related Concept Videos

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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Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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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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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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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.
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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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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

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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,...
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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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[Bradyarrhythmias: diagnostics].

Carsten Walter Israel

    Deutsche Medizinische Wochenschrift (1946)
    |May 14, 2016
    PubMed
    Summary

    Bradyarrhythmias, often causing syncope and dizziness, necessitate pacemaker implantation. This review aids in interpreting electrocardiograms (ECGs) for accurate diagnosis and treatment of bradycardia.

    Area of Science:

    • Cardiology
    • Medical Diagnostics

    Background:

    • Bradyarrhythmias are a common cause of significant symptoms like syncope and exercise intolerance.
    • Over 100,000 pacemakers are implanted annually in Germany due to bradyarrhythmias.
    • Causes include sinus node dysfunction and atrioventricular conduction abnormalities.

    Purpose of the Study:

    • To present the electrocardiographic (ECG) findings in bradycardia.
    • To provide guidance for confident ECG interpretation in bradycardia.
    • To highlight challenging differential diagnoses in bradycardia.

    Main Methods:

    • Review of ECG characteristics associated with various bradyarrhythmias.
    • Discussion of diagnostic challenges in differentiating bradyarrhythmias.
    • Emphasis on the role of Holter monitoring for intermittent bradycardia.

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    Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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    Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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    Main Results:

    • Detailed description of ECG patterns for sinus node dysfunction (e.g., sinus bradycardia, sinoatrial block).
    • Explanation of ECG findings in atrioventricular conduction abnormalities (e.g., AV block, bundle branch block).
    • Guidance on distinguishing complex ECG presentations like vagally induced bradycardia and different types of AV block.

    Conclusions:

    • Accurate ECG interpretation is crucial for optimal bradycardia management.
    • Understanding differential diagnoses improves diagnostic confidence.
    • This review offers practical tips for ECG analysis in bradycardia.