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Related Concept Videos

Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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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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...
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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Related Experiment Video

Updated: Jun 3, 2026

Robotic Ablation of Atrial Fibrillation
11:21

Robotic Ablation of Atrial Fibrillation

Published on: May 29, 2015

Pulsed-Field Ablation for Persistent Atrial Fibrillation: A Systematic Review and Meta-Analysis.

Daniel Villarreal1, Thalia Melamed2,3, Juliana Perez-Pinzon4

  • 1Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.

Journal of Cardiovascular Electrophysiology
|June 2, 2026
PubMed
Summary
This summary is machine-generated.

Pulsed field ablation (PFA) shows 72.3% success in preventing atrial arrhythmia recurrence after 12 months for persistent atrial fibrillation (AF). This non-thermal method is safe, with recurrence rates comparable to traditional thermal ablation.

Keywords:
cryoballoon ablationmeta‐analysispersistent atrial fibrillationpulmonary vein isolationpulsed‐field ablationradiofrequency ablationsystematic review

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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Reduction of Iatrogenic Atrial Septal Defects with an Anterior and Inferior Transseptal Puncture Site when Operating the Cryoballoon Ablation Catheter
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Published on: June 15, 2015

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Last Updated: Jun 3, 2026

Robotic Ablation of Atrial Fibrillation
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Published on: May 29, 2015

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

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Reduction of Iatrogenic Atrial Septal Defects with an Anterior and Inferior Transseptal Puncture Site when Operating the Cryoballoon Ablation Catheter
08:00

Reduction of Iatrogenic Atrial Septal Defects with an Anterior and Inferior Transseptal Puncture Site when Operating the Cryoballoon Ablation Catheter

Published on: June 15, 2015

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Technology

Background:

  • Pulsed field ablation (PFA) is a novel non-thermal energy source for pulmonary vein isolation (PVI).
  • PFA offers potential advantages in procedural time and safety for atrial fibrillation (AF) ablation.
  • Limited large-scale data exist on PFA efficacy in persistent AF patients.

Purpose of the Study:

  • To systematically review and meta-analyze 12-month atrial arrhythmia recurrence after PFA in persistent AF.
  • To compare PFA efficacy against thermal ablation methods.

Main Methods:

  • Systematic search of major biomedical databases (MEDLINE, Embase, Scopus, LILACS, Cochrane).
  • Inclusion of studies on first-time PVI with PFA in persistent AF patients reporting 12-month outcomes.
  • Random-effects models and meta-regression for outcome analysis and heterogeneity assessment.

Main Results:

  • 26 studies including 3744 patients met criteria; pooled 12-month freedom from recurrence was 72.3% (95% CI, 69.0-75.5).
  • Substantial heterogeneity (I²=74.4%) was observed.
  • No significant difference in recurrence was found compared to thermal ablation (HR, 0.91 [95% CI, 0.78-1.07]).
  • Ablation-related adverse events were <1% for both PFA and thermal ablation.

Conclusions:

  • PFA demonstrates high arrhythmia-free survival at 12 months in persistent AF patients.
  • PFA is associated with low rates of adverse events.
  • Comparative data against thermal ablation are exploratory due to limited and heterogeneous comparator studies.