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Abnormal atrial activation in young patients with lone atrial fibrillation

Fredrik Holmqvist1, Morten S Olesen, Arnljot Tveit

  • 1Department of Cardiology, Lund University, SE-221 85 Lund, Sweden. fredrik.holmqvist@med.lu.se

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|September 25, 2010
PubMed

Insights

Early atrial fibrillation (AF) in young adults with normal hearts shows distinct P-wave morphology, suggesting altered atrial electrophysiology may cause AF. This finding highlights potential early markers for the arrhythmia.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Diagnostics

Background:

  • Patients with atrial fibrillation (AF) often exhibit altered atrial conduction.
  • P-wave analysis via signal-averaged electrocardiogram (ECG) non-invasively assesses atrial conduction.
  • Limited data exists on P-wave morphology in early-stage AF patients with structurally normal hearts.

Purpose of the Study:

  • To investigate P-wave morphology in young patients with early-onset lone paroxysmal AF.
  • To compare atrial conduction characteristics between AF patients and healthy controls.
  • To determine if altered atrial electrophysiology precedes or results from AF.

Main Methods:

  • Signal-averaged P-wave analysis of standard 12-lead ECGs in 36 patients with lone AF (under 40 years) and matched controls.
  • Echocardiography performed concurrently with ECG.
  • Statistical comparison of heart rate, PQ-interval, P-wave duration, and P-wave morphology distribution.

Main Results:

  • No significant differences in heart rate, PQ-interval, or P-wave duration between AF cases and controls.
  • A statistically significant difference in P-wave morphology distribution (P=0.001).
  • A higher proportion of AF patients displayed impaired interatrial conduction compared to controls.

Conclusions:

  • Early-onset lone paroxysmal AF is associated with distinct P-wave morphology differences compared to healthy individuals.
  • Altered atrial electrophysiology is common in the early stages of AF.
  • These electrophysiological changes may be a primary cause of AF in young, healthy patients.
Abstract

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