Hi,
I have been working on a stimulus setup that is performing an extracellular stimulus (open or closed) of a large-tissue block submerged in a bath that is meant to mimic a piece of ventricular tissue. The mesh tissue has been tuned and has induced reentry using the psd function from the 02_EP_Tissue/21_reentry_induction example for 600ms, then I applied the stimulus to try to terminate the rotor. I have tried out the various configurations of both electrodes and types from the 02_EP_Tissue/02_stimulus example, but currently, the best result I got is seeing some slight effects on the tissue near the stimulation site, and they are not strong or sustained enough to significantly perturb or terminate the rotor. My current setup uses three different electrodes: a stimulus on the epicardial side selected from a grid based on electrical potential (crct type 2), some grounding electrodes across the bath face on the endocardial side (crct type 3), and aux electrodes on the endocardial side (crct type 0), and the stimulation strength is 1000 mV for 2ms, using Tomek20Land17_DynSarc ionic model, conduction velcority 0.57 and 0.24, tissue size 5cm by 5cm by 12mm, with 3mm bath, resolution 250 mircons. I wonder why my stimulation does not work and how the stimulation should be configured—whether through the electrode arrangement, grounding configuration, stimulation waveform, or other parameters—to produce a sufficiently strong and sustained effect that can successfully interrupt the rotor.
