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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.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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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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Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
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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...
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Updated: Jan 11, 2026

Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
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Repeat ablation timing for recurrent atrial fibrillation: A prospective study.

Shiyi Wang1, Ziliang Song1, Jiongchao Guo1

  • 1Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Heart Rhythm
|November 12, 2025
PubMed
Summary

Shorter time to repeat ablation for atrial fibrillation (AF) improves outcomes. Early repeat ablation, especially within 12 months, is linked to lower AF recurrence rates.

Keywords:
Ablation outcomesAblation timingLongest episode of atrial fibrillationRecurrent atrial fibrillationRepeat catheter ablation

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Research

Background:

  • Optimal timing for repeat ablation in recurrent atrial fibrillation (AF) is not well-established.
  • Previous studies lack sufficient data on the influence of timing on repeat ablation outcomes.

Purpose of the Study:

  • To evaluate the impact of the time interval between AF diagnosis recurrence and repeat ablation on procedural success.
  • To identify the optimal timing for repeat ablation in patients experiencing recurrent AF.

Main Methods:

  • A multicenter prospective cohort study involving 1144 patients with recurrent AF.
  • Patients were grouped into quartiles based on the AF diagnosis-recurrence-to-ablation time (DRAT).
  • Primary endpoint was freedom from AF/atrial tachycardia (AT) recurrence at 12 months post-ablation.

Main Results:

  • Success rates (freedom from AF/AT recurrence) were highest in the shortest DRAT quartile (0-12 months) at 71.0%.
  • Success rates progressively decreased with longer DRAT intervals (Q2: 61.7%, Q3: 61.6%, Q4: 54.7%).
  • A statistically significant difference (P < .001) was observed across the DRAT quartiles.

Conclusions:

  • Shorter DRAT is significantly associated with reduced AF/AT recurrence after repeat ablation.
  • Early repeat ablation, particularly within 12 months of recurrence, may be a beneficial strategy for improving patient outcomes.
  • Findings suggest a need for considering earlier intervention in recurrent AF management.