title: Evaluation of a New Shirt-Based Electrocardiogram Device for Cardiac Screening in Soccer Players: Comparative Study With Treadmill Ergospirometry.
abstract: BACKGROUND
  Prevention of cardiac events during competitive sports is fundamental. New technologies with remote monitoring systems integrated into clothing could facilitate the screening of heart disease. Our aim was to evaluate the feasibility of Nuubo system during a field stress test performed by soccer players, comparing results with treadmill ergospirometry as test reference.
  
  
  METHODS
  Nineteen male professional soccer players (19.2 ± 1.6 years) were studied. Wireless electrocardiographic monitoring during a Yo-Yo intermittent recovery test level 1 in soccer field and subsequent analysis of arrhythmias were firstly performed. Subsequently, in a period no longer than 4 weeks, each player underwent cardiopulmonary exercise testing in hospital.
  
  
  RESULTS
  During Yo-Yo test, electrocardiogram (ECG) signal was interpretable in 16 players (84.2%). In the other three players, ECG artifacts did not allow a proper analysis. Estimation of maximum oxygen consumption was comparable between two exercise tests (VO2max 53.3 ± 2.4 vs. 53.7 ± 3.0 mL/kg/min for Yo-Yo test and ergometry respectively; intra-class correlation coefficient 0.84 (0.63 - 0.93), P < 0.001). No arrhythmias were detected in any player during both tests.
  
  
  CONCLUSIONS
  The use of Nuubo's technology allows an accurate single-lead electrocardiographic recording and estimation of reliable performance variables during exercise testing in field, and provides a new perspective to cardiac remote monitoring in collective sports.
authors.affiliation: Department of Cardiology, Consorcio Hospital General Universitario, Valencia, Spain; Villarreal Club de Futbol SAD Medical Services, Villarreal, Spain.
authors.forename: Oscar
authors.initials: O
authors.lastname: Fabregat-Andres
authors.affiliation: Villarreal Club de Futbol SAD Medical Services, Villarreal, Spain.
authors.forename: Adolfo
authors.initials: A
authors.lastname: Munoz-Macho
authors.affiliation: Villarreal Club de Futbol SAD Medical Services, Villarreal, Spain.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Adell-Beltran
authors.affiliation: Nuubo, Madrid, Spain.
authors.forename: Xavier
authors.initials: X
authors.lastname: Ibanez-Catala
authors.affiliation: Nuubo, Madrid, Spain.
authors.forename: Agustin
authors.initials: A
authors.lastname: Macia
authors.affiliation: Department of Cardiology, Consorcio Hospital General Universitario, Valencia, Spain.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Facila
keywords: Cardiac screening; ECG monitoring; Ergospirometry; Exercise test; Soccer; Wireless device