Title :
Electrocardiography system of twelve leads for the study of the spatial variability of ventricular repolarization intervals
Author :
Gómez-Rodríguez, Rafael ; Rodríguez-Colín, Héctor ; Alvarado-Serrano, Carlos
Author_Institution :
Dept. of Electr. Eng., CINVESTAV-IPN, Mexico City, Mexico
Abstract :
This work describes the design and operation of a electrocardiograph capable of acquiring simultaneous recordings of 12-lead for the study of the spatial variability of ventricular repolarization intervals. The electrocardiography system consists of an acquisition module with a dedicated channel for each lead with a circuit for detection of lead failure. Each channel has a gain of 1000, a CMRR of 90 dB and a bandwidth of 0.05 Hz to 150 Hz. It uses a isolated power supply and high isolation amplifiers at the output system. An additional stage of programmable amplification is added for signals conditioning before being acquired by the computer. The communication between these systems is by the USB port using a commercial data acquisition system (ADS) model Ni-USB 6211 with a resolution of 16 bits. The system display the 12-lead with a interface developed in LabVIEW and the data can be stored in ¿.xls files¿ for later processing.
Keywords :
bioelectric phenomena; biomedical electrodes; data acquisition; electrocardiography; medical signal processing; signal processing equipment; skin; CMRR; LabVIEW; Ni-USB 6211 model; USB port; acquisition module; bandwidth 0.05 Hz to 150 Hz; data acquisition system; electrocardiography system; isolated power supply; isolation amplifiers; programmable amplification; signal conditioning; skin-electrode impedance; spatial variability; ventricular repolarization intervals; Bandwidth; Circuits; Computer displays; Data acquisition; Electrocardiography; High power amplifiers; Power supplies; Power system modeling; Signal resolution; Universal Serial Bus; QT dispersion; electrocardiograph; skin-electrode impedance;
Conference_Titel :
Electrical Engineering, Computing Science and Automatic Control,CCE,2009 6th International Conference on
Conference_Location :
Toluca
Print_ISBN :
978-1-4244-4688-9
Electronic_ISBN :
978-1-4244-4689-6
DOI :
10.1109/ICEEE.2009.5393417