Title :
Controlling electrical side effects of cardiac stimulus pulses due to high impedance electrodes
Author :
Andrews, Craig A. ; Kermani, Bahram G. ; Cascio, Wayne E. ; Nagle, H. Troy
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
A method of measuring the extracellular voltage field in working cardiac tissue with high impedance sensors immediately after a superthreshold stimulation pulse has been developed. Previously, the stimulus pulse charged the input circuitry of the front-end amplifier with an amplitude much greater than the biological signal desired. To address this problem a blanking period was introduced which disables the amplifiers for the duration of the superthreshold stimulus pulse. As a result of this process, electrical activity can be measured almost immediately after the superthreshold stimulus pulse without distortion
Keywords :
bioelectric phenomena; biological techniques; cardiology; voltage measurement; cardiac stimulus pulses; electrical activity; electrical side effects control; extracellular voltage field measurement method; front-end amplifier; high impedance electrodes; input circuitry; superthreshold stimulus pulse; working cardiac tissue; Biosensors; Blanking; Cardiac tissue; Distortion measurement; Extracellular; Impedance measurement; Pulse amplifiers; Pulse circuits; Pulse measurements; Voltage measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.415233
