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

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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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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

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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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In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

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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...
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Related Experiment Video

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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Isolated palpitations and ventricular pre-excitation.

Miguel A Arias1, Marta Pachón1, Cristina Martín-Sierra1

  • 1Arrhythmia Unit Department of Cardiology Complejo Hospitalario Universitario de Toledo Toledo Spain.

Journal of Arrhythmia
|August 13, 2020
PubMed
Summary
This summary is machine-generated.

A young man experienced palpitations due to a rare heart condition. Electrophysiologic study confirmed a fasciculoventricular accessory pathway, a type of ventricular pre-excitation.

Keywords:
accessory pathwayelectrophysiologytachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Electrophysiology

Background:

  • Palpitations are a common reason for medical consultation.
  • Ventricular pre-excitation on electrocardiogram (ECG) suggests an accessory pathway.
  • Fasciculoventricular pathways are uncommon causes of pre-excitation.

Purpose of the Study:

  • To report a case of isolated palpitations.
  • To describe the diagnostic findings of ventricular pre-excitation.
  • To identify the specific accessory pathway responsible.

Main Methods:

  • Patient presentation with isolated palpitations.
  • Twelve-lead electrocardiogram (ECG) for rhythm and conduction assessment.
  • Electrophysiologic study (EPS) for precise pathway localization.

Main Results:

  • ECG revealed sinus rhythm with ventricular pre-excitation.
  • Electrophysiologic study confirmed a fasciculoventricular accessory pathway.
  • This pathway was identified as the cause of the patient's symptoms.

Conclusions:

  • Fasciculoventricular accessory pathways can cause isolated palpitations.
  • ECG and EPS are crucial for diagnosing and localizing these pathways.
  • Accurate diagnosis ensures appropriate management of pre-excitation syndromes.