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Related Concept Videos

Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

788
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...
788
Decreased pulse rate01:14

Decreased pulse rate

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Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
1.0K
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,...
1.2K
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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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.
2.7K
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

735
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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Related Experiment Video

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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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[Bradycardic arrhythmias].

T Willich1, A Goette1

  • 1Medizinische Klinik II, St. Vincenz-Krankenhaus, Paderborn.

Deutsche Medizinische Wochenschrift (1946)
|February 13, 2014
PubMed
Summary
This summary is machine-generated.

Pacemaker implantation is indicated for symptomatic bradycardia and some asymptomatic conditions. Reversible causes must be treated before permanent pacemaker insertion, with temporary drug therapy considered for acute symptomatic bradycardia.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Context:

  • Bradycardia arrhythmias, stemming from impulse formation and conduction disorders, frequently necessitate pacemaker implantation.
  • Prognostic indications for pacemakers exist in asymptomatic patients, though with generally lower recommendation classes.
  • Acute myocardial infarction and cardiac surgery can precipitate bradycardia, potentially requiring pacemaker implantation.

Purpose:

  • To outline the indications for pacemaker implantation in bradycardia.
  • To emphasize the importance of addressing reversible causes before definitive pacemaker implantation.
  • To review available pacemaker systems, including temporary, permanent, multi-chamber, and emerging leadless technologies.

Summary:

  • Symptomatic bradycardia due to impulse disorders typically warrants pacemaker implantation.
  • Prognostic indications for pacemakers in asymptomatic individuals exist but carry weaker recommendations.
  • Reversible causes of bradycardia must be treated before permanent pacemaker implantation; drug therapy is a temporary option for acute symptomatic cases.
  • Pacemaker systems range from temporary to permanent, with variations in chamber configurations (one-, two-, three-chamber) and ongoing development of leadless systems.

Impact:

  • Provides a comprehensive overview of pacemaker indications and system types for clinicians.
  • Highlights the critical step of investigating and treating reversible causes of bradycardia.
  • Informs about the evolving landscape of pacemaker technology, including leadless systems.