Design And Realization Of Epicardium Potential Measurement System Based On

The heart is one of the most important organs in the human body. As the pace of life speeds up and the pressure of life increases, the threat to the health of human heart increases day by day. Heart disease accounts for about one third of the total deaths in the world and it has become the leading cause of death. As a result, genesis, diagnosis and treatment of heart disease have been becoming research hotspots of scholars throughout the world.Epicardial potential mapping is an important method for studying cardiac electrophysiology and it can be applied to research on complex arrhythmia such as the atrial fibrillation (AF). In this thesis, cardiac mapping technology and the structure of epicardial potential mapping system are introduced; the problems of existed epicardial potential mapping system in practical applications are summarized and analyzed; and solutions to those problems are proposed. On the basis of those proposed solutions, the design scheme of FPGA-based epicardial potential mapping system is proposed to meet the needs of research.According to the design scheme, the design of hardware system and FPGA is implemented. Firstly, circuits of multiplexers (MUXs) and the analog-to-digital converter (ADC) are designed and the printed circuit board (PCB) is made and debugged. Secondly, FPGA digital logic is designed using Verilog hardware description language (HDL) and multichannel epicardial potential signals are sampled. Finally, a bandpass finite impulse response (FIR) filter (3～600 Hz) is designed and verified in Matlab/Simulink and DSP Builder.