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Signal-averaged P wave duration and the long-term risk of permanent atrial fibrillation

Ulrik Dixen1, Mette Vang Larsen, Lasse Ravn

  • 1Department of Cardiology, University Hospital of Gentofte, Copenhagen, Denmark. ulrikdixen@mail.dk

Scandinavian Cardiovascular Journal : SCJ
|October 19, 2007
PubMed

Insights

Prolonged signal-averaged P wave duration (SAPWD) predicts the long-term risk of developing permanent atrial fibrillation (AF). A longer SAPWD indicates a higher risk of permanent AF, highlighting its role in atrial remodeling.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Research

Background:

  • Atrial fibrillation (AF) recurrence is a significant clinical concern.
  • Identifying predictors of permanent AF is crucial for patient management.

Purpose of the Study:

  • To evaluate the long-term risk of permanent AF development.
  • To assess the association between signal-averaged P wave duration (SAPWD) and permanent AF.
  • To examine clinical and echocardiographic factors influencing permanent AF risk.

Main Methods:

  • Observational study design.
  • 131 patients with prior ECG-documented AF and restored sinus rhythm were followed long-term.
  • Analysis of clinical, echocardiographic, and electrophysiological parameters, including SAPWD.

Main Results:

  • Prolonged SAPWD was significantly associated with an increased risk of permanent AF (p=0.006).
  • The 3-year risk of permanent AF was higher with prolonged SAPWD (180 ms) compared to normal SAPWD (130 ms).
  • Age, gender, left atrial size, and AF history duration did not show prognostic value. Hypertension appeared to reduce risk, possibly due to ACE-inhibitor use.

Conclusions:

  • Prolonged SAPWD serves as a significant risk factor for the long-term development of permanent AF.
  • SAPWD is a valuable marker of atrial remodeling and predicts AF progression.
  • Further research may explore interventions targeting atrial remodeling to prevent permanent AF.
Abstract

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