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Títol: Do ventricular repolarization interval ratios depend on heart rate and should they be rate-corrected?
Autor: Alvarado Serrano, Carlos
Ramos Castro, Juan José
Pallàs Areny, Ramon
Altres autors/autores: Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GRUP ISI - Grup d´Instrumentació, sensors i interfícies
Editorial: Institute of Electrical and Electronics Engineers
Matèries: Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Instrumentació i mesura
Heart beat
QT interval
Heart rate
Cor -- Batecs
Tipus de document: Conference report
Descripció: 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 on the ratios between several ventricular repolarization intervals, that can be useful as risk predictors of malignant ventricular arrhythmias is unknown. This study analyzes the influence of HR on QTp/QT, JTp/JT, Tpe/JTp, and Tpe/JT ratios on a healthy subject during exercise. The intervals were measured in V3 lead and the characteristic points of QRS complex and T wave were detected by computer algorithms based on the wavelet transform (WT). Exercise stress was graded according to the four initial stages of the Bruce protocol. The heart rate was divided into two ranges: less than 100 beats/min and from 100 beats/min to 185 beats/min. When HR exceeded 100 beats/min, QTp/QT and JTp/JT ratios increased whereas Tpe/JTp and Tpe/JT ratios decreased for increasing HR. However, when HR was below 100 beats/min, those same four ratios were independent from HR. As opposed to the QT interval, there is no need to correct QTp/QT, JTp/JT, Tpe/JTp, and Tpe/JT ratios when HR is below 100 beats/min
Peer reviewed
Altres identificadors i accés: Alvarado Serrano, C.; Ramos Castro, J.; Pallás Areny, R. Do ventricular repolarization interval ratios depend on heart rate and should they be rate-corrected?. A: Engineering in Medicine and Biology Society Annual International Conference. Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2003. Piscataway, 2003, Vol. 1, 59-61
0-7803-7789-3
1094-687X
http://hdl.handle.net/2117/1304
Disponible al dipòsit:E-prints UPC
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