Fig. 5
symbiotic cardiac pacing in vivo. a Illustration of symbiotic cardiac pacemaker system turned on by wireless passive trigger. b A block diagram of the components in symbiotic cardiac pacemaker system. c Stimulation pulse with different frequencies generated by pacemaker unit. d, e Symbiotic cardiac pacemaker system turned on by wireless passive trigger in animal experiments. f ECG, Femoral Artery Pressure (FAP) and heart rate (HR) and systolic blood pressure (sBP), Stimulus-R wave (S-R) interval during symbiotic cardiac pacemaker system work. g ECG of the intrinsic heart rate, with a normal sBP. h ECG with a pacing stimulus in the refractory period, with a normal sBP. i ECG of successful pacing, with a significantly decreased sBP. j ECG with failed pacing by attenuated stimuli, with a restored sBP
