Now showing items 21-32 of 32

    • Human emotion characterization by heart rate variability analysis guided by respiration 

      Valderas Yamuza, Maria Teresa; Bolea, Juan; Orini, M; Laguna Lasaosa, Pablo; Vallverdú Ferrer, Montserrat; Bailón Luesma, Raquel (2019-01-28)
      Article
      Open Access
      Developing a tool which identifies emotions based on their effect on cardiac activity may have a potential impact on clinical practice, since it may help in the diagnosing of psycho-neural illnesses. In this study, a method ...
    • Influence of teaching activities, environmental conditions and class schedules on teacher stress measured with a smartwatch: a pilot study 

      Fretes, Gabriela; Llurba, Cèlia; Palau, Ramon (OmniaScience, 2023-10)
      Article
      Open Access
      To recognize and assess the job stressors that teachers face in daily practice is essential. One of the most used objective measures of stress is the heart rate (HR). This pilot study explored the use of a wearable device ...
    • Non-linear HRV analysis to quantify the effects of intermittent hypoxia using an OSA rat model 

      Romero, Daniel; Jané Campos, Raimon (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      In this paper, a non-linear HRV analysis was performed to assess fragmentation signatures observed in heartbeat time series after intermittent hypoxia (IH). Three markers quantifying short-term fragmentation levels, PIP, ...
    • Novel sweat-based wearable device for advanced monitoring of athletic physiological biometrics 

      Aguilar Torán, Javier; Rabost Garcia, Genís; Toinga Villafuente, Samantha; Álvarez Carulla, Albert; Colmena Rubil, Valeria; Fajardo Garcia, Andrea; Cardona Bonet, Andrea; Casals Terré, Jasmina; Muñoz Pascual, Xavier; Miribel Català, Pere; Punter Villagrasa, Jaime (Multidisciplinary Digital Publishing Institute (MDPI), 2023-11-28)
      Article
      Open Access
      Blood testing has traditionally been the gold standard for the physiological analysis and monitoring of professional athletes. In recent years, blood testing has moved out of the laboratory thanks to portable handheld ...
    • Peripheral heart rate detection based on a monolithic impedance meter 

      García Abián, Jonathan (Universitat Politècnica de Catalunya, 2011-06-27)
      Master thesis
      Open Access
      The objective of this project is to identify the peripheral heart rate in the arm or hand, using dry electrodes and an impedance converter monolithic, by bioimpedance measures. To perform the project, first has been ...
    • Relationship Between Heart Rate Recovery and Disease Severity in Chronic Obstructive Pulmonary Disease Patients 

      Blanco Almazán, María Dolores; Romero Pérez, Daniel; Groenendaal, Willemijn; Lijnen, Lien; Smeets, Christophe; Ruttens, David; Catthoor, Francky; Jané Campos, Raimon (2020)
      Conference lecture
      Open Access
      Chronic obstructive pulmonary disease (COPD) patients exhibit impaired autonomic control which can be assessed by heart rate variability analysis. The study aims to evaluate the cardiac autonomic responses of COPD patients ...
    • The Effect of Electrocardiographic Lead Choice on RR Time Series 

      García González, Miguel Ángel; Ramos Castro, Juan José; Fernández Chimeno, Mireya (2011)
      Conference lecture
      Restricted access - publisher's policy
      Results of heart rate variability analysis depend on the quality of the initial RR time series that is measured only in one lead of the ECG. This work shows that RR time series can subtly change from lead ...
    • Time-frequency features for impedance cardiography signals during anesthesia using different distribution kernels 

      Escrivá, Jesús; Gambus, Pedro L.; Jensen, Erik Weber; Vallverdú Ferrer, Montserrat (2018-01-23)
      Article
      Open Access
      Objective: This works investigates the time-frequency content of impedance cardiography signals during a propofol-remifentanil anesthesia. Materials and Methods: In the last years, impedance cardiography (ICG) is a ...
    • Unconstrained L1-regularized minimization with interpolated transformations for heart motion compensation 

      Avilés Rivero, Angélica Ivone; Sobrevilla Frisón, Pilar; Casals Gelpí, Alicia (2014)
      Conference report
      Restricted access - publisher's policy
      Motion compensation constitutes a challenging issue in minimally invasive beating heart surgery. Since the zone to be repaired has a dynamic behaviour, precision and surgeon's dexterity decrease. In order to solve this ...
    • Validity of the Polar V800 monitor for measuring heart rate variability in mountain running route conditions 

      Caminal Magrans, Pere; Sola Almirón, Fuensanta; Gomis Román, Pedro; Guasch, Eduard; Perera Lluna, Alexandre; Mont Girbau, Lluis (2018-03-01)
      Article
      Open Access
      Purpose This study was conducted to test, in mountain running route conditions, the accuracy of the Polar V800™ monitor as a suitable device for monitoring the heart rate variability (HRV) of runners. Method Eighteen ...
    • Variations in breathing patterns increase low frequency contents in HRV spectra 

      García González, Miguel Ángel; Vázquez Seisdedos, Carlos; Pallàs-Areny, Ramon (Institute of Physics Publishing, 2000)
      Article
      Open Access
      This paper shows that variations in breathing patterns broaden heart rate variability (HRV) spectral bands and increase the power amplitude of low-frequency bands. Because of these influences, spectral markers for HRV ...
    • Ventilatory threshold prediction by spectral analysis of heart rate variability in incremental maximal tests 

      Benítez Herrera, Adolfo; García González, Miguel Ángel; Angulo, R.; Rodríguez, F.; Iglesias, X.; Bescós, R.; Marina, M.; Padullés, M. (2010)
      Conference lecture
      Open Access
      Ventilatory thresholds (VT1 and VT2) are useful in many fields of medicine and sports. Nevertheless, their measurement is cumbersome and needs trained personnel. This work proposes an alternative method to predict VT1, ...