Caption of Fig 1: Access site was through the right jugular vein. Patient laid flat and turned head to left in the implantation process, and ST segment in proximal electrode IC-ECG would elevate when head turn to right or turn up with pillow.
The sensing threshold ranges from 2.5mV to 20mV (utmost setting at pacemaker), with an average of 7.34 mV. The pacing threshold was 2 mA in one case, others no more than 1 mA, with an average of 0.72 mA. The pulse width is 1.5 ms and not programmable. Pacemaker setting was set to VVI mode, Rate 40 to 60 ppm, Sense 1.5 to 3 mV, Output 2-8 mA. Anesthesiologists have been told the best tact was maintain sinus rhythm, and pacing rate could adjust as their need. No case reported shock or low blood pressure.