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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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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...
571
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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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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Increased pulse rate01:17

Increased pulse rate

1.2K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
1.2K
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

664
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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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.3K
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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Pulse rhythm01:30

Pulse rhythm

1.5K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
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Persistent Long R-P Tachycardia.

Zian H Tseng1, Melvin Scheinman

  • 1Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California, San Francisco School of Medicine, 500 Parnassus Avenue, Room MU E-434, Box 1354, San Francisco, CA 94143-1354, USA.

Cardiac Electrophysiology Clinics
|August 4, 2017
PubMed
Summary
This summary is machine-generated.

This case study details a successful catheter ablation for permanent junctional reciprocating tachycardia (PJRT) that was resistant to prior treatments. It emphasizes precise mapping of the accessory pathway within the coronary sinus for effective ablation.

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Case Reports

Background:

  • Permanent junctional reciprocating tachycardia (PJRT) is a rare supraventricular tachycardia characterized by decremental retrograde conduction.
  • PJRT can be refractory to conventional antiarrhythmic drugs and catheter ablation, posing a significant clinical challenge.

Purpose of the Study:

  • To present a case of persistent, recalcitrant PJRT that failed multiple previous treatment attempts.
  • To describe a successful catheter ablation strategy targeting a complex accessory pathway within the coronary sinus.

Main Methods:

  • Detailed electrophysiological study and mapping of the accessory pathway (AP) within the coronary sinus (CS) during tachycardia.
  • Catheter ablation targeting the AP-atrium interface distal to the AP recording, followed by ablation at the AP potential at the coronary sinus os.

Main Results:

  • Successful elimination of PJRT following the described ablation strategy.
  • Demonstration of the oblique course and conduction properties of the AP within the CS during PJRT.

Conclusions:

  • Complex atrioventricular connections in PJRT necessitate meticulous mapping of the coronary sinus.
  • A targeted ablation approach focusing on the AP-atrium interface and the AP potential can be effective for refractory PJRT.