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Related Experiment Videos

[Persistent atrial flutter induced by propafenone (Rytmonorm)]

T Fazekas1, J Kiss, I Pap

  • 1Szent-Györgyi Albert Orvostudományi Egyetem, Szeged, I. Belgyógyászati Klinika.

Orvosi Hetilap
|August 14, 1994
PubMed
Summary
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Class Ic antiarrhythmic drugs, like propafenone, can effectively treat atrial fibrillation but may paradoxically induce atrial flutter in 3.5-5% of patients. This proarrhythmic effect requires careful consideration during treatment.

Area of Science:

  • Cardiology
  • Pharmacology
  • Electrophysiology

Background:

  • Atrial fibrillation is a common arrhythmia requiring effective pharmacologic management.
  • Class Ic antiarrhythmic drugs are frequently used for their efficacy in terminating atrial fibrillation.

Observation:

  • Two patients receiving propafenone for atrial fibrillation developed sustained, rapid atrial flutter.
  • The induced atrial flutter exhibited 2:1 atrioventricular conduction at rates of 230-270 bpm.

Findings:

  • Class Ic antiarrhythmic drugs, including propafenone, flecainide, and encainide, carry a risk of inducing atrial flutter.
  • This proarrhythmic effect is observed in approximately 3.5-5% of patients treated for atrial fibrillation.

Implications:

Related Experiment Videos

  • Clinicians should be aware of the potential for atrial flutter induction by Class Ic antiarrhythmics.
  • Understanding the mechanism of proarrhythmia is crucial for patient management and risk stratification.