Technique for sharing of stimulating electrode and recording electrode in esophageal cardiac electrophysiology catheter

Abstract

The invention relates to a technique for sharing of a stimulating electrode and a recording electrode in an esophageal cardiac electrophysiology catheter. According to the technical scheme the technique is mainly characterized in that an anode electrode A and a cathode electrode B are simultaneously connected to a stimulating pulse circuit and an esophageal electrocardiogram amplification circuit;when the stimulating pulse circuit carries out electrical pulse output, connection between the esophageal electrocardiogram amplification circuit and the electrodes is cut off; when electrical pulseoutput is ended, the anode electrode A and the cathode electrode B are controlled to communicate; and when the communicating time of the anode electrode A and the cathode electrode B reaches a set first time threshold, connection between the anode electrode A and the cathode electrode B is cut off, and meanwhile, the esophageal electrocardiogram amplification circuit communicates with the anode electrode A and the cathode electrode B. By multiplexing the stimulating electrode and the recording electrode, the technique can make a signal of the recording electrode closer to a left atrium nearbyan esophageal wall to guarantee the waveform quality of the esophageal electrocardiogram.

Description

technical field [0001] The invention relates to the technical field of esophageal electrophysiology, in particular to a technique for sharing stimulation electrodes and recording electrodes in an esophagus cardiac electrophysiology catheter. Background technique [0002] Esophageal cardiac electrophysiology catheters usually use two sets of electrodes that are independent of each other to perform electrical pulse stimulation and esophageal ECG recording respectively to avoid the interference of the stimulation pulse on the ECG waveform. This is because the voltage amplitude of the electrical pulse on the stimulation electrode is usually about 10V The voltage amplitude of the esophageal ECG is usually below 1mV. Among them, in order to ensure the accuracy of the electrical pulse stimulation position, the clinician needs to make the stimulating electrode close to the left atrium near the esophageal wall during operation; in addition, in order to ensure the amplitude and resolu...

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Problems solved by technology

[0004] However, the above-mentioned existing technical solutions have the following defects: when using two sets of electrodes independent of each other to perform electrical pulse stimulation and esophageal electrocardiogram recording respectively, since the esophagus is close to the left atrium, there is only one optimal position, and the deviation of the stimulating electrodes from the left atrium will increase The stimulation voltage causes discomfort to the patient; the amplitude of the ECG waveform becomes smaller when the recording electrode deviates from the left atrium, and it is difficult to distinguish the slight amplitude change on the waveform, and it is easy to be covered by the interference wave; clinicians usually use the recording electrode to observe the waveform first for positioning. Use the determined best position for stimulation, and use electrodes in other positions for esophageal waveform recording to reduce patient discomfort, but this method sacrifices the waveform quality of esophageal ECG

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