Fig. 3: eBICS relaying external stimulation pulses allow control of heart rate and correction of arrythmias. | Nature Communications

Fig. 3: eBICS relaying external stimulation pulses allow control of heart rate and correction of arrythmias.

From: In situ assembly of an injectable cardiac stimulator

Fig. 3

Seismocardiograms of zebrafish (a) before and (b) during (in red) external stimulation. c Normalized power spectrum of the Fourier transform of the seismocardiograms before and during external stimulation. The blue arrow indicates the shift in the beat frequency. d The colored lines indicate irregularities in the beat profile, i.e., arrhythmias, which were resolved by external stimulation (e) Synchronized heartbeats during stimulation (in red). f The normalized power spectra of the seismocardiograms in (d) and (e) show the shift to the regular (in red) beat pattern during external stimulation. g Seismocardiograpy setup to record heartbeats with a 1-mm spherical indenter. h Recording of external stimulation via seismocardiography.

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