Evaluation of a newly designed shirt-based ECG and breathing sensor for home-based training as part of cardiac rehabilitation for coronary artery disease

Erik Skobel*, Alvaro Martinez-Romero, Britta Scheibe, Patrick Schauerte, Nikolaus Marx, Jean Luprano, Christian Knackstedt

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Background Participation in phase-III cardiac rehabilitation (CR) remains low but adherence could potentially be improved with supervised home-based CR. New technological approaches are needed to provide sufficient supervision with respect to safety and performance of individual exercise programmes. Design The newly designed closed-loop tool, HeartCycle's guided exercise (GEX) system, will support professionals and patients during exercise-based CR. Patients wear a dedicated shirt with incorporated wireless sensors, and ECG, heart rate (HR), breathing frequency (BF), and activity are monitored during exercise. This information is streamed live to a mobile device (PDA) that processes these parameters. Methods A phase-I study was performed to evaluate feasibility, function, and reliability of this GEX device and compare it to conventional cardiac exercise testing (CPX, spiroergometry) in 50 patients (seven women, meanSD age 699 years, body mass index 26 +/- 3kg/m(2), ejection fraction 58 +/- 10%). ECG, HR, and BF were monitored using standard equipment and the GEX device simultaneously. Furthermore, HR recorded on the PDA was compared with CPX measurements. Results The fit of the shirt and the sensor was good. No technical problems were encountered. All occurring arrhythmia were reliably detected. There was an acceptable comparability between HR on the GEX device vs. CPX, a good comparability between HR on the PDA vs. CPX, and a moderate comparability between BF on the GEX device vs. CPX. Conclusions Comparability between CPX and the GEX device was acceptable for HR measurement and moderate for BF; arrhythmias were reliably detected. HR processing and display on the PDA was even better comparable. The whole system seems suitable for monitoring home-based CR. Further studies are now needed to implement training prescription to facilitate individual exercise.
Original languageEnglish
Pages (from-to)1332-1340
JournalEuropean Journal of Preventive Cardiology
Issue number11
Publication statusPublished - Nov 2014


  • Cardiac rehabilitation
  • monitoring
  • training

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