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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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Differential atrial performance at rest and exercise in athletes: Potential trigger for developing atrial

L Gabrielli1,2, B H Bijnens3,4, C Brambila1

  • 1IDIBAPS (IDIBAPS-Institut d'Investigacions Biomèdiques August Pi i Sunyer), Thorax Clinic Institute, Hospital Clínic, University of Barcelona, Barcelona, Spain.

Scandinavian Journal of Medicine & Science in Sports
|January 12, 2016
PubMed
Summary
This summary is machine-generated.

Highly trained athletes exhibit atrial arrhythmias. Exercise increases atrial size and function, but a subgroup with atrial dilatation shows impaired contractile reserve, suggesting reduced exercise capacity.

Keywords:
Atrial functionathletesatrial arrhythmiaimaging stress test

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Area of Science:

  • Cardiology
  • Sports Medicine
  • Physiology

Background:

  • Endurance athletes have an increased risk of atrial arrhythmias.
  • Atrial volume and function during exercise in athletes are not well understood.

Purpose of the Study:

  • To analyze atrial size and contractile function during exercise in endurance athletes.
  • To compare atrial function during exercise between athletes and sedentary individuals.

Main Methods:

  • Echocardiography was performed at baseline and during exercise in 50 endurance athletes and 30 sedentary controls.
  • Left and right atrial size and function were assessed using two-dimensional echocardiography.
  • Peak negative strain (Sa) during atrial contraction and active atrial emptying volume (AEV) were measured.

Main Results:

  • Both athletes and controls showed significant increases in atrial deformation and AEV with exercise.
  • A subgroup of athletes with significant left/right atrial dilatation exhibited a lower increment in AEV and deformation during exercise compared to other athletes.
  • Despite larger atrial volumes, athletes achieved similar increases in AEV as controls, but with less deformation.

Conclusions:

  • Exercise increases atrial strain and emptying volume in both athletes and controls.
  • A subgroup of athletes with atrial dilatation demonstrates impaired atrial contractile reserve during exercise.
  • This impaired reserve may contribute to the increased risk of arrhythmias in highly trained athletes.