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Related Concept Videos

Decreased pulse rate01:14

Decreased pulse rate

785
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...
785
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

387
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...
387
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...
2.3K
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

663
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,...
663
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

322
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...
322
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.5K
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.
1.5K

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Related Experiment Video

Updated: Dec 29, 2025

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
06:07

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

Published on: May 23, 2021

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[Acute bradycardia].

F Hasan1, H Bogossian2, B Lemke2

  • 1Innere III - Klinik für Kardiologie, Elektrophysiologie und Angiologie, Klinikum Lüdenscheid, Paulmannshöher Str. 14, 58515, Lüdenscheid, Deutschland. Fuad.hasan@klinikum-luedenscheid.de.

Herzschrittmachertherapie & Elektrophysiologie
|February 2, 2020
PubMed
Summary
This summary is machine-generated.

Acute bradycardia

Keywords:
Cardiac arrestCardiac arrhythmiaHeart diseasePacemaker, artificialRhythmological emergencies

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Area of Science:

  • Cardiology
  • Emergency Medicine

Background:

  • Clinical significance of acute bradycardia is symptom-dependent, not solely heart rate.
  • Compensatory mechanisms, like increased ejection fraction, can mask bradycardia symptoms.

Purpose of the Study:

  • To emphasize the importance of identifying reversible causes of acute bradycardia.
  • To highlight available treatment options for acute bradycardia.

Main Methods:

  • Review of clinical relevance and management of acute bradycardia.
  • Focus on symptom-driven assessment and identification of reversible etiologies.

Main Results:

  • Nearly 50% of acute bradycardias stem from reversible causes.
  • Symptomatic presentation is key to clinical relevance, not just low heart rate.

Conclusions:

  • Identifying reversible causes is crucial for emergency bradycardia management.
  • Effective treatments, including medications and pacemakers, are available.