• Análisis de la variabilidad de intervalos de tiempo del ECG 

    Alvarado Serrano, Carlos (Universitat Politècnica de Catalunya, 2001-11-19)
    Tesi
    Accés obert
    La prolongación y el aumento de la dispersión del intervalo QT han sido propuestos como factores de riesgo de arritmias ventriculares malignas en varias condiciones clínicas, entre ellas en pacientes con infarto de miocardio ...
  • Automatic detection of ECG ventricular activity waves using continuous spline wavelet transform 

    Alvarado Serrano, Carlos; Arregui, J.; Ramos Castro, Juan José; Pallàs Areny, Ramon (2005)
    Text en actes de congrés
    Accés obert
    In this study, we present detection algorithms of characteristic points of the QRS and T waves based on the continuous wavelet transform (CWT) with splines. This technique can handle any integer scale and the analysis is ...
  • 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)
    Text en actes de congrés
    Accés obert
    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 ...
  • Novel indices of ventricular repolarization to screen post myocardial infarction patients 

    Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs Areny, Ramon (Elsevier, 2006-05)
    Article
    Accés obert
    We propose novel indices of ventricular repolarization intervals, the JTp/JT, Tpe/JTp and Tpe/JT ratios. These indices have been compared with the duration of the ventricular repolarization intervals and other ratios in ...
  • Spatial variability of ventricular activity intervals in normal subjects and old myocardial infarction patients 

    Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs Areny, Ramon (Institute of Electrical and Electronics Engineers, 2004-06)
    Text en actes de congrés
    Accés obert
    Increased dispersion of QT interval in the 12-lead ECG have been proposed as risk factor of ventricular arrhythmias in post myocardial infarction (post-MI) patients, but its sensitivity and specifity is low for diagnosis ...