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Related Concept Videos

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

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Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
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Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
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Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
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Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
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Tonsillitis II: Management01:26

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Related Experiment Video

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Antiarrhythmics Management During Electrophysiology Procedures: A Stepwise Approach.

Giacomo Mugnai1, Davide Genovese2, Francesco Santoro3

  • 1Division of Cardiology, Cardio-Thoracic Department, University Hospital of Verona, Verona, Italy.

Journal of Cardiovascular Electrophysiology
|February 8, 2026
PubMed
Summary

Stopping antiarrhythmic drugs (AADs) before electrophysiology (EP) procedures requires careful consideration of drug washout periods. This review offers guidance on AADs washout to ensure accurate diagnoses and successful EP interventions.

Keywords:
ablationantiarrhythmic drugselectrophysiologywash out

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Area of Science:

  • Cardiology
  • Clinical Pharmacology

Background:

  • Antiarrhythmic drugs (AADs) can interfere with diagnostic accuracy and procedural success in interventional electrophysiology (EP).
  • Establishing a drug-free baseline is crucial for effective EP procedures.

Purpose of the Study:

  • To review protocols and rationale for discontinuing AADs before EP procedures.
  • To provide evidence-based guidance for standardizing AADs washout to improve safety and success.

Main Methods:

  • Analysis of procedure-specific AADs washout requirements for various arrhythmias.
  • Development of a drug-by-drug guide for calculating washout periods based on pharmacokinetic and pharmacodynamic principles.

Main Results:

  • Detailed guide on half-life, metabolism, and elimination pathways for major AAD classes.
  • Recommendations for adjusting washout times based on patient-specific factors like age, renal, and hepatic function.

Conclusions:

  • Standardized AADs washout protocols are essential for interventional EP.
  • Clinician guidance on AADs washout can enhance diagnostic accuracy and procedural outcomes.