Study on Impedance of Implantable Cardiac Pacemaker in Unipolar/Bipolar Pacing Mode by in Vitro Experiment

• Published in: Zhongguo yi liao qi xie za zhi Vol. 46; no. 3; p. 237
• Main Authors: Ding, Ding, Lin, Kai-Bin, Huang, Dong, Guo, Xin-Wei, Wang, Yan-Peng, Li, Shuai, Li, Jing-Bo, Niu, Jin-Hai
• Format: Journal Article
• Language: Chinese
• Published: China 30.05.2022
• Subjects: cardiac pacemaker; circuit impedance; unipolar/bipolar pacing mode; in vitro experiment
• ISSN: 1671-7104
• DOI: 10.3969/j.issn.1671-7104.2022.03.001

The unipolar/bipolar pacing mode of pacemaker is related to its circuit impedance, which affects the battery life. In this study, the experiment scheme of pacemaker circuit impedance test was constructed. The human blood environment was simulated by NaCl solution, and the experimental environment temperature was controlled by water bath. The results of experiments showed that under the experimental conditions similar to clinical human parameters, the difference between the circuit impedance of bipolar mode and unipolar mode is 120~200 Ω. The results of the experiment confirmed that the circuit impedance of bipolar circuit was larger than that of unipolar mode, which was found in clinical practice. The results of this study have reference value to the optimization of pacing mode and the reduction of pacemaker power consumption.