120962 20221221152608.0 doi 10.23919/CinC53138.2021.9662701 sideral 131271 ART-2021-131271 eng Garcia, Diego Ventilatory Thresholds Estimation Based on ECG-derived Respiratory Rate 2021 The purpose of this work is to study the feasibility of estimating the first and second ventilatory thresholds (VT1 and VT2, respectively) by using electrocardiogram (ECG)-derived respiratory rate during exercise testing. The ECGs of 25 healthy volunteers during cycle ergometer exercise test with increasing workload were analyzed. Time-varying respiratory rate was estimated from an ECG-derived respiration signal obtained from QRS slopes' range method. VT1 and VT2 were estimated as the points of maximum change in respiratory rate slope using polynomial spline smoothing. Reference VT1 and VT2 were determined from the ventilatory equivalents of O2 and CO2. Estimation errors (in watts) of -13.96 (54.84) W for VT1 and -8.06 (39.63) Wfor VT2 (median (interquartile range)) were obtained, suggesting that ventilatory thresholds can be estimated from solely the ECG signal. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI-FEDER/RTI2018-097723-B-I00 info:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS group info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Kontaxis, Spyridon Universidad de Zaragoza (orcid)0000-0002-1297-0691 Hernandez-Vicente, Adrian Universidad de Zaragoza (orcid)0000-0001-6025-5070 Hernando, David (orcid)0000-0002-1462-4880 Milagro, Javier (orcid)0000-0002-7842-9611 Pueyo, Esther Universidad de Zaragoza (orcid)0000-0002-1960-407X Garatachea, Nuria Universidad de Zaragoza (orcid)0000-0001-8374-9081 Bailon, Raquel Universidad de Zaragoza (orcid)0000-0003-1272-0550 Lazaro, Jesus Universidad de Zaragoza (orcid)0000-0001-8742-0072 1006 245 Universidad de Zaragoza Dpto. Fisiatría y Enfermería Área Educación Física y Depor. 5007 520 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Ingen.Sistemas y Automát. 5008 800 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Teoría Señal y Comunicac. 48 (2021), 1-4 Comput. cardiol. Computing in Cardiology 2325-8861 238847 http://zaguan.unizar.es/record/120962/files/texto_completo.pdf Postprint 2670295 http://zaguan.unizar.es/record/120962/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:120962 articulos driver 2022-12-21-12:54:59 ARTICLE