Screenshots of the PatchControl 384 software showing Kir2.1 current traces in response to a voltage step protocol. Measured on the SyncroPatch 384PE (a predecessor model of SyncroPatch 384) using the whole cell patch methodology and multi-hole chips (4 holes per well), the success rate of valuable data for the analysis was 93%. The IC50 value of Barium was determined as 6.38 µM (Literature: 16.2 µM, Schram et al. Cardiovasc Res. 2003).