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. 2019 Dec 27;42(1):54–65. doi: 10.1080/0886022X.2019.1707098

Figure 1.

Figure 1.

Electrocardiogram (ECG) strips of four patients with long QT premexiletine, followed by torsade de pointes (TdP) and postmexiletine ECG strips. In patient A, the postmexiletine ECG was recorded 24 h after the first dose and after a total administration of 400 mg. In patient B, the post-mexiletine ECG was recorded 15 h after the first dose and after a total administration of 300 mg. In patient C, the postmexiletine ECG was recorded 25 h after the first dose and after a total administration of 600 mg of mexiletine. In patient D, the postmexiletine ECG was recorded 23 h after the first dose and after a total administration of 600 mg. Note that all four episodes of TdP occurred following a long-short interval. (With permission from Xiaolin Xue [109]).