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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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

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

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...
Transient Ischemic Attack l: Introduction01:26

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A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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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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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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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A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
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Transient ventricular fibrillation. A clinical case report.

Yosef Blaer1, Vladimir Khalameizer, Jamal Jafari

  • 1Cardiology Department, Barzilai Medical Center Campus, Ashkelon, Ben-Gurion University of the Negev, Israel. blaer@barzi.health.gov.il

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Summary

Self-terminating ventricular fibrillation (VF), a potentially lethal arrhythmia, was observed in a patient without heart disease. This rare clinical event highlights that such dangerous heart rhythm disturbances can spontaneously resolve.

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Published on: December 28, 2012

Area of Science:

  • Cardiology
  • Electrophysiology
  • Clinical Medicine

Background:

  • Ventricular fibrillation (VF) is a life-threatening cardiac arrhythmia characterized by rapid, uncoordinated contractions of the ventricles.
  • While VF often requires immediate intervention, the phenomenon of self-terminating VF is infrequently reported in clinical settings.
  • Previous literature primarily documented self-terminating VF in animal models, with limited human case reports.

Observation:

  • A case of self-terminating ventricular fibrillation (VF) was recorded in a 42-year-old female patient.
  • The patient had no history of coronary artery disease or structural heart abnormalities.
  • The episode of VF resolved spontaneously without external medical intervention.

Findings:

  • This case represents a rare clinical manifestation of self-terminating ventricular fibrillation.
  • The occurrence in a patient without underlying cardiac pathology is highly unusual.
  • It demonstrates that potentially lethal arrhythmias can exhibit spontaneous termination in humans.

Implications:

  • Highlights the complex and variable nature of ventricular fibrillation.
  • Suggests the need for further research into the mechanisms underlying spontaneous arrhythmia termination.
  • Informs clinical understanding and management strategies for sudden cardiac events, even in seemingly healthy individuals.