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Impact of Intracardiac Neurons on Cardiac Electrophysiology and Arrhythmogenesis in an Ex Vivo Langendorff System
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Can simple Doppler measurements estimate interatrial conduction time?

Dragos Cozma1, Jerome Kalifa, Sorin Pescariu

  • 1Institute of Cardiovascular Medicine, Str. Gheorghe Adam nr. 13a, Timisoara, Romania. dragoscozmafr@yahoo.fr

Pacing and Clinical Electrophysiology : PACE
|April 12, 2003
PubMed

Insights

Echocardiography can reliably estimate interatrial conduction time (ia-CT), a factor in atrial fibrillation (AF), without invasive electrophysiologic studies. This non-invasive method may aid in selecting patients for atrial resynchronization therapy.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Imaging

Background:

  • Prolonged interatrial conduction time (ia-CT) is implicated in atrial fibrillation (AF) pathophysiology.
  • Accurate ia-CT measurement is crucial for identifying candidates for multisite atrial pacing.
  • Current ia-CT measurement requires invasive electrophysiologic studies.

Purpose of the Study:

  • To compare echocardiographic measurements with electrophysiologic studies for ia-CT.
  • To determine the correlation between non-invasive and invasive ia-CT assessments.
  • To evaluate the potential of echocardiography for estimating ia-CT.

Main Methods:

  • 32 patients undergoing electrophysiologic studies were included.
  • Interatrial conduction time (ia-CT) was measured invasively.
  • Doppler echocardiography was used to measure ia-CT via the DT interval.
  • P wave duration and left atrial dimensions were also assessed.

Main Results:

  • A strong statistical correlation was found between ia-CT and the echocardiographic DT measurement (r = 0.79, P < 0.0001).
  • No significant correlation was observed between ia-CT and P wave duration.
  • No significant correlation was observed between ia-CT and left atrial dimensions.

Conclusions:

  • Doppler-derived DT measurement offers a reliable, non-invasive method to estimate ia-CT.
  • DT measurement can serve as a simple selection criterion for atrial resynchronization therapy.
  • This non-invasive approach may reduce the need for invasive electrophysiologic studies.
Abstract

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