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Atrial flutter: entrainment characteristics

A L Waldo1

  • 1Department of Medicine, Case Western Reserve University/University Hospitals of Cleveland, Ohio 44106, USA.

Journal of Cardiovascular Electrophysiology
|March 1, 1997
PubMed
Summary
This summary is machine-generated.

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Entrainment, a method of capturing a tachycardia's circuit without interruption, aids in identifying atrial flutter ablation targets. This technique helps map circuits and determine optimal pacing for restoring normal heart rhythm.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Entrainment was initially observed during rapid pacing of type I atrial flutter.
  • It involves capturing the reentrant circuit of a tachycardia without terminating it.

Purpose of the Study:

  • To explain the principles of entrainment in atrial flutter.
  • To highlight its applications in identifying ablation targets and mapping circuits.
  • To determine optimal pacing strategies for terminating atrial flutter.

Main Methods:

  • Observations during rapid (overdrive) pacing of type I atrial flutter.
  • Analysis of wavefront interactions (orthodromic and antidromic) during entrainment.
  • Distinguishing between manifest and concealed entrainment.

Related Experiment Videos

Main Results:

  • Entrainment captures the reentrant circuit, resetting the tachycardia to the pacing rate.
  • The antidromic wavefront typically collides with the orthodromic wavefront of the preceding beat.
  • Principles of entrainment allow for identification of successful ablation targets and mapping sites.
  • Appropriate pacing rates can be determined to interrupt atrial flutter and restore sinus rhythm.

Conclusions:

  • Entrainment is a valuable electrophysiological phenomenon in managing atrial flutter.
  • It provides crucial information for guiding ablation strategies and pacing therapies.
  • Understanding entrainment facilitates the restoration of normal sinus rhythm in patients with atrial flutter.