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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, 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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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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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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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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Introduction to Supraventricular Tachycardia.

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Summary

Paroxysmal supraventricular tachycardia (PSVT) is a rapid heart rhythm with sudden onset. This guide helps clinicians diagnose and treat challenging PSVT cases in the electrophysiology lab.

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Paroxysmal supraventricular tachycardia (PSVT) presents as a rapid heart rhythm with abrupt onset and termination.
  • Common etiologies include atrioventricular nodal reentrant tachycardia (50%-60%), atrioventricular reentrant tachycardia associated with Wolff-Parkinson-White syndrome (25%-30%), and atrial tachycardia (10%).
  • Less frequent causes involve focal junctional, atriofascicular, permanent reciprocating junctional, and nodoventricular/nodofascicular tachycardias.

Purpose of the Study:

  • To provide a clinical guide for managing complex cases of PSVT.
  • To assist electrophysiologists in navigating diagnostic and therapeutic challenges in the electrophysiology laboratory.

Main Methods:

  • Case-based review of challenging PSVT scenarios.
  • Discussion of diagnostic and therapeutic dilemmas encountered in electrophysiology.

Main Results:

  • Detailed analysis of common and rare causes of PSVT.
  • Strategies for differentiating various PSVT mechanisms.

Conclusions:

  • Effective management of PSVT requires a thorough understanding of its diverse etiologies.
  • This guide aims to enhance clinical decision-making for challenging PSVT presentations.