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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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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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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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Introduction Cardiac Emergencies01:30

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Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
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Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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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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Updated: Oct 18, 2025

Implantation of Total Artificial Heart in Congenital Heart Disease
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Transient Congenital Complete Heart Block: A Case Report.

Ying-Tzu Ju1, Yu-Jen Wei1, Ming-Ling Hsieh1

  • 1Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70403, Taiwan.

Children (Basel, Switzerland)
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Congenital complete heart block, a serious condition in newborns, can sometimes resolve spontaneously. This case report details a rare instance of transient congenital complete heart block that recovered without intervention.

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Area of Science:

  • Pediatrics
  • Cardiology
  • Neonatology

Background:

  • Congenital complete heart block (CCHB) is a severe condition with high infant mortality.
  • CCHB in infants with normal heart structure is often linked to maternal autoimmune diseases and is typically irreversible.
  • Maternal autoantibodies like SSA/Ro and SSB/La are frequently implicated in CCHB pathogenesis.

Observation:

  • A female neonate presented with bradycardia at 37 weeks gestation.
  • The infant had no structural heart defects and her mother had no history of autoimmune disease.
  • Serological tests for maternal autoantibodies (SSA/Ro, SSB/La) were negative.

Findings:

  • The neonate exhibited CCHB, which resolved spontaneously within 5 days, restoring normal sinus rhythm.
  • This recovery occurred without any medical intervention or treatment.
  • The etiology of this transient CCHB remains undetermined.

Implications:

  • This case highlights the possibility of transient CCHB with spontaneous resolution, even in the absence of typical risk factors.
  • It suggests that not all cases of CCHB are irreversible and may warrant careful monitoring before intervention.
  • Further research is needed to understand the mechanisms behind transient CCHB and identify potential diagnostic markers.