Fig. 3. Some examples of EADs provoked using the L-type calcium increase protocol, as described in the methods section. The first EAD caused by the increasing intervention for each drug is highlighted in red. The less torsadogenic drug (nitrendipine) requires more provocation than the control to cause an EAD (i.e. its EAD threshold is higher), and the more torsadogenic drug (cisapride) requires less provocation (i.e. its EAD threshold is lower).
