title: Acute, Exercise Dose-Dependent Impairment in Atrial Performance During an Endurance Race: 2D Ultrasound Speckle-Tracking Strain Analysis.
abstract: This study sought to understand and characterize the acute atrial response to endurance exercise and the influence of the amount of exercise performed.
  
  
  
  Endurance exercise seems to be recognized as a risk factor for developing atrial arrhythmia. Atrial geometrical and functional remodeling may be the underlying substrate.
  
  
  
  Echocardiography was performed in 55 healthy adults at baseline and after a 3-stage trail race: a short race (S) (14 km), n = 17; a medium race (M) (35 km), n = 21; and a long race (L) (56 km), n = 17. Analysis consisted of standard, speckle-tracking assessment of both the left ventricle (LV) and right ventricle (RV) and both the left atrium (LA) and the right atrium (RA): a-wave strain (Sa) and strain rate (Ra) as a surrogate for atrial contractile function and s-wave strain (St) and strain rate (SR) as reservoir function.
  
  
  
  After the race, RA reservoir function decreased in group M (Δ% SRs: -12.5) and further in group L (Δ% SRs: -15.4), with no changes in group S. RA contractile function decreased in group L (Δ% SRa: -9.3), showed no changes in group M (Δ% SRa: +0.7), and increased in group S (Δ% SRa: +14.8). A similar trend was documented in LA reservoir and contractile function but with less pronounced changes. The decrease in RA reservoir after the race correlated with the decrease in RV global longitudinal strain (GLS) (Δ% RVGLS vs. RASt and RASRs: +0.44; p < 0.05 and +0.41, respectively; p < 0.05).
  
  
  
  During a trail-running race, an acute exercise-dose dependent impairment in atrial function was observed, mostly in the RA, which was related to RV systolic dysfunction. The impact on atrial function of long-term endurance training might lead to atrial remodeling, favoring arrhythmia development.
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain. Electronic address: meriluprime@hotmail.com.
authors.forename: Maria
authors.initials: M
authors.lastname: Sanz-de la Garza
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain.
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Grazioli
authors.affiliation: Institució Catalana de Recerca i Estudis Avançats, Universitat Pompeu Fabra, Barcelona, Spain.
authors.forename: Bart H
authors.initials: BH
authors.lastname: Bijnens
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain; Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway.
authors.forename: Sebastian I
authors.initials: SI
authors.lastname: Sarvari
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Guasch
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain.
authors.forename: Carolina
authors.initials: C
authors.lastname: Pajuelo
authors.affiliation: Catalan Sports Council, Barcelona, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Brotons
authors.affiliation: Department of Medical Science, University of Girona, Girona, Spain.
authors.forename: Enric
authors.initials: E
authors.lastname: Subirats
authors.affiliation: Cardiology Service, Hospital Trueta, Department of Medical Sciences, University of Girona, Institute of Biomedical Research Girona, Spain.
authors.forename: Ramon
authors.initials: R
authors.lastname: Brugada
authors.affiliation: Department of Medical Science, University of Girona, Girona, Spain.
authors.forename: Emma
authors.initials: E
authors.lastname: Roca
authors.affiliation: Cardiology Department, Institut d'investigacions Biomèdiques August Pi i Sunyer, Hospital Clínic, Barcelona, Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: Sitges
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D016279:Atrial Function, Left; D016280:Atrial Function, Right; D064752:Atrial Remodeling; D059267:Cardiomegaly, Exercise-Induced; D015150:Echocardiography, Doppler / Q000379:methods*; D015444:Exercise; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D015588:Observer Variation; D010807:Physical Endurance; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D013997:Time Factors
keywords: athlete′s heart; atrial fibrillation; endurance exercise