Now showing items 1-20 of 35

    • A comparison of heartbeat detectors for the seismocardiogram 

      García González, Miguel Ángel; Argelagós Palou, Ariadna; Fernández Chimeno, Mireya; Ramos Castro, Juan José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Open Access
      The study aimed to study the accuracy in RR time series derived from the seismocardiogram when employing different heartbeat detectors in subjects measured in a quiet environment. The ECG and seismocardiogram of 17 healthy ...
    • A methodology to quantify the differences between alternative methods of heart rate variability measurement 

      García González, Miguel Ángel; Fernández Chimeno, Mireya; Guede Fernández, Federico; Ferrer Mileo, Víctor; Argelagós Palou, Ariadna; Álvarez Gómez, Laura; Parrado Romero, Eva; Moreno Sánchez, Jordi; Capdevila, Lluis; Ramos Castro, Juan José (Institute of Physics (IOP), 2015-12-14)
      Article
      Open Access
      This work proposes a systematic procedure to report the differences between heart rate variability time series obtained from alternative measurements reporting the spread and mean of the differences as well as the agreement ...
    • A novel algorithm for fast BCG cycle extraction in ambulatory scenarios 

      Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2016)
      Conference lecture
      Restricted access - publisher's policy
      A novel algorithm JDet for ballistocardiogram (BCG) cycle extraction is presented that is intended for the fast generation of ensemble averages in ambulatory scenarios where the ECG signal is not available. First, the ...
    • A novel index based on fractional calculus to assess the dynamics of heart rate variability: changes due to chi or yoga meditations 

      García González, Miguel Ángel; Ramos Castro, Juan José; Fernández Chimeno, Mireya (Computing in Cardiology, 2012)
      Conference lecture
      Restricted access - publisher's policy
      The study aims to present and interpret a novel index based on fractional calculus ( αc) and to assess differences in RR time series dynamics in subjects during meditation. Fractional differintegration (FDI) of a RR time ...
    • A photoplethysmography smartphone-based method for heart rate variability assessment: device model and breathing influences 

      Guede Fernández, Federico; Ferrer Mileo, Víctor; Mateu Mateus, Marc; Ramos Castro, Juan José; García González, Miguel Ángel; Fernández Chimeno, Mireya (2020-03)
      Article
      Open Access
      A measurement method of heart rate and heart rate variability (HRV) based on smartphone has been developed and validated. The method is based on photoplethysmography (PPG) acquired with the smartphone camera (SPPG). SPPG ...
    • An application of fractional differintegration to heart rate variability time series 

      García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José; Capdevila, Lluis; Parrado, Eva (2013-07)
      Article
      Restricted access - publisher's policy
      Fractional differintegration is used as a new tool to characterize heart rate variability time series. This paper proposes and focuses in two indexes (ac and fnQ) derived from the fractional differintegration operator. ...
    • Análisis de biomarcadores electrocardiográficos en pacientes con Síndrome de Brugada 

      Ospina Rueda, Karen Alejandra (Universitat Politècnica de Catalunya, 2021-05-31)
      Bachelor thesis
      Open Access
      El síndrome de Brugada es una patología cardiaca eléctrica primaria genéticamente determinada. Esta se caracteriza por alteraciones electrocardiográficas distintivas, en donde el paciente puede llegar a presentar muerte ...
    • Assessment of heart rate variability during an ultra-endurance mountain trail race by multi-scale entropy analysis 

      Vallverdú Ferrer, Montserrat; Ruiz Muñoz, Aroa; Roca Rodríguez, Emma; Caminal Magrans, Pere; Rodríguez Guisado, Ferran Agustin; Irurtia Amigo, Alfredo; Perera Lluna, Alexandre (2017-12-01)
      Article
      Open Access
      The aim of the study was to analyze heart rate variability (HRV) response to high-intensity exercise during a 35-km mountain trail race and to ascertain whether fitness level could influence autonomic nervous system (ANS) ...
    • Changes in heart rate variability (HRV) in field hockey players during the 2006 World Cup 

      Rodas Font, Gil; Yanguas Leyes, Javier; Pedret, Carles; Ramos Castro, Juan José; Capdevila, L. (2011-07)
      Article
      Open Access
      The aim of this study is to determine the changes in heart rate variability (HRV) in field hockey players during the course of a world championship. The Spanish national team took part in the study by making daily records ...
    • Changes in heart rate variability indexes due to drowsiness in professional drivers measured in a real environment 

      García González, Miguel Ángel; Fernández Chimeno, Mireya; Ramos Castro, Juan José (Computing in Cardiology, 2012)
      Conference lecture
      Restricted access - publisher's policy
      The study aims to assess the changes in Heart Rate Variability (HRV) indexes in healthy subjects whi le driving in a real environment in order to detect drowsiness. The ECG of ten professional drivers was acquired ...
    • Characterization of HRV and QRS slope during audiovisual stimulation 

      Arcentales, Andrés; Raza, Melissa; Giraldo Giraldo, Beatriz (2017)
      Conference report
      Restricted access - publisher's policy
      Emotions are directly related whit external or internal stimulation which a person is submitted, influencing these stimuli on their physical and mental health. These emotional changes produce variations in cardiovascular ...
    • Comparison of omega wave system and polar S810i to detect R-R intervals at rest 

      Parrado Romero, Eva; García González, Miguel Ángel; Ramos Castro, Juan José; Cervantes Blasquez, Julio Cesar; Rodas Font, Gil; Capdevila Ortis, Lluís (2010)
      Article
      Restricted access - publisher's policy
      The present study was performed to compare R-R interval data and heart rate variability indices obtained from the Polar S810i and the Omega Wave Sport System for a total of 96 adults in a supine position. Data were ...
    • Comparison of two cardiac output monitors, qCO and LiDCO, during general anesthesia 

      Escrivá, Jesús; Gabarrón, Eva; Fort, Pol; Pan, Y.; Shengjin, Ge; Liao, Q; Vallverdú Ferrer, Montserrat (2016-08-09)
      Article
      Open Access
      Background: Optimization of cardiac output (CO) has been evidenced to reduce postoperative complications and to expedite the recovery. Likewise, CO and other dynamic cardiac parameters can describe the systemic blood flow ...
    • Deformable mesh model for cardiac motion estimation from MRI data 

      González Paredes, Alex (Universitat Politècnica de Catalunya, 2009)
      Master thesis (pre-Bologna period)
      Open Access
      The use of technology in medical applications has expanded tremendously in the last 50 years, playing an important role in diagnosis and treatment of disease. As a consequence of this growth, it has been possible to develop ...
    • Desarrollo de una aplicación para dispositivos móviles para el estudio de hábitos de vida saludables 

      Miranda Vidal, Hoostins Heigueer (Universitat Politècnica de Catalunya, 2012-07)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] This project explains the design and implementation of an application for mobile devices for the study of healthy lifestyle. For this purpose, the heart rate estimation and the mood state of an user must be obtained. ...
    • Desenvolupament d’una unitat d’adquisició i monitorització de dades per a una vehicle 

      Selin Lorenzo, Irina (Universitat Politècnica de Catalunya, 2020-06-29)
      Bachelor thesis
      Open Access
      L’objectiu del present projecte és la posada en pràctica dels coneixements adquirits durant el grau, que s’hauran de materialitzar en el present treball. L’usuari d’una bicicleta i l’entorn que l’envolta, generen unes ...
    • Detecció i monitoratge no invasius de la freqüència cardíaca mitjançant visió per computador. 

      Heredia Soler, Gerard (Universitat Politécnica de Catalunya, 2020-07-02)
      Bachelor thesis
      Open Access
      La freqüència cardíaca és un dels indicadors fisiològics i psicològics més importants de l'ésser humà. No obstant això, els mètodes tradicionals per mesurar-la impliquen contacte amb sensors electrònics o instruments ...
    • Do ventricular repolarization interval ratios depend on heart rate and should they be rate-corrected? 

      Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2003-09)
      Conference report
      Open Access
      QT interval decreases with increasing heart rate (HR), hence to define normal values of QT interval for different heart rates requires the application of a QT interval rate correction formula. However, the influence of HR ...
    • Estudi de la repercussió de cardiopaties congènites en la capacitat de bombeig del cor 

      Ferraté Domingo, Elisenda (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Open Access
      En l’actualitat, el nombre d’investigacions i de projectes realitzats amb la col·laboració de diverses disciplines de la ciència i la tecnologia és més elevat. Per tal de trobar equacions o lleis genèriques que permetin ...
    • Global and transient effects of intermittent hypoxia on heart rate variability markers: evaluation using an obstructive sleep apnea model 

      Romero, Daniel; Jané Campos, Raimon (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
      Article
      Open Access
      Intermittent hypoxia (IH) produces autonomic dysfunction that promotes the development of arrhythmia and hypertension in patients with obstructive sleep apnea (OSA). This paper investigated different heart rate variability ...