FIG. 4.

Propidium iodide uptake of rabbit cardiomyocytes after a single shock at five times the threshold for calcium transient activation for each cell. The dashed red lines indicate the interval during which the shocks were applied. The shock duration, average electric field values, and the number of experiments are shown next the traces. **p < 0.01 with a two-tailed Student's t-test. Reproduced from Semenov et al.⁵⁴ courtesy of Springer Nature.