Figure 8.

Effects of apamin on the maintenance of VF in HF ventricles. A, p-ECG recordings of pacing-induced VF episodes at baseline and after apamin infusion in a HF ventricle. Before apamin infusion, the pacing-induced VF episode is shock-terminated (>180 s in duration, upper panel). After apamin infusion, the pacing-induced VF episode became self-terminated (<180 s in duration, lower panel). B and C, effects of apamin on the types (B) and duration (C) of VF episodes. Note that apamin increases self-terminated VF episodes and shortens VF duration. The small squares in the data box indicate the mean value.