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Figure 4 Odds ratios and 95% confidence intervals for the risk of long-QT syndrome (LQT)-related symptoms, according to the tertile of maximal T2- to T1-wave amplitude ratio and the QTc interval. The y axis is on a log scale. The reference group is tertile 1. (A) In LQT type 1 (LQT1) patients, the maximum T2 to T1 amplitude ratio was 3 or more in tertile 3 and 2 or less in tertile 1. (B) In LQT type 2 (LQT2) patients, the corresponding ratio was 2.4 or more in tertile 3 and 1.5 or less in tertile 1.
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