非叠加法体表逐搏检测His束电图的研究

STUDY OF BEAT TO BEAT SURFACE RECORDING OF HIS BUNDLE ACTIVITY WITHOUT AVERAGING IN MAN

目的 研究非叠加无屏蔽体表逐搏检测His束电位在临床上的应用价值。方法 使用极低噪声三通道高增益放大器 ,16位A/D转换 ,通过USB接口与微机连接 ;应用模式识别加数字滤波方法对微信号进行处理 ,记录时受检者取仰卧位。结果 46个志愿者用逐搏体表His束检测仪清晰地记录到心房与心室之间的His束电活动 ,即A波、H波与V波 ;8例患者体表检测与心内导管电极记录进行对照 ,两种方法获得的参数基本一致。结论 无创体表逐搏检测His束电活动有广泛临床价值 ,对心脏电生理研究和对房室传导阻滞的诊断有高度实用性。

Objective To investigate the application of open beat to beat techniques recording His bundle activity without digital averaging. Methods Recording was performed with very low noise, high gain amplifiers and by analog filtering. 3 brigade amplifiers and 16 bite A/D were connected to a microcomputer by USB. The signal was processed by A pattern recognition plus digital filtering software. The subjects were in a supine position during the recording. Results A prominent waveform was observed between the atrial and ventricular complexes and corresponded to His bundle activity in 46 volunteers. Recordings in 8 patients were compared with records obtained by intracardiac electrode, and a good conformation was seen. Conclusion The noninvasive method of beat to beat surface recording of His bundle activity has broad clinical applicability and high utility for the patients with latent A-V block and eletrophysiologic study.