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Related Concept Videos

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

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

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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...
225
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

514
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,...
514
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

207
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...
207
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

273
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

Updated: Nov 1, 2025

Noninvasive Electrocardiography in the Perinatal Mouse
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Noninvasive Electrocardiography in the Perinatal Mouse

Published on: June 12, 2020

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Neonatal Arrhythmia.

A Joshi1, S Humagain2

  • 1Department of Pediatrics, Dhulikhel Hospital, Kathmandu University Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal.

Kathmandu University Medical Journal (KUMJ)
|June 24, 2021
PubMed
Summary
This summary is machine-generated.

Neonatal supraventricular tachycardia (SVT) can occur, but is often manageable. This case highlights successful treatment with digoxin for a newborn with persistent SVT.

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Area of Science:

  • Neonatal cardiology
  • Pediatric electrophysiology
  • Fetal medicine

Background:

  • Neonatal arrhythmias are uncommon and may represent a continuation of fetal arrhythmias.
  • Supraventricular tachycardia (SVT) is the most frequent arrhythmia observed in newborns.
  • Early recognition and evaluation are crucial for optimal outcomes in neonatal arrhythmias.

Observation:

  • A newborn presented with persistent fetal tachycardia (251 bpm) and was diagnosed with supraventricular tachycardia (SVT) via electrocardiography.
  • Echocardiography revealed severe tachycardia, dilated cardiac chambers, moderate to severe tricuspid regurgitation, and moderately reduced ventricular function.
  • Initial treatment with intravenous adenosine and amiodarone showed limited efficacy.

Findings:

  • Intravenous digoxin administration resulted in a positive response, normalizing heart rate and improving cardiac function.
  • Cardiac chambers normalized on follow-up echocardiography.
  • The infant was discharged on oral digoxin and successfully weaned off medication by 12 months of age.

Implications:

  • This case underscores the efficacy of digoxin in managing refractory neonatal SVT.
  • Effective management of neonatal arrhythmias can lead to favorable long-term cardiac function and development.
  • Highlighting the importance of prompt diagnosis and tailored therapeutic strategies for neonatal tachyarrhythmias.