It's also important to obtain an electrocardiogram, which typically shows a prolonged QT interval, appearance of a U wave, and atrial or ventricular tachyarrhythmias.

心电图也很重要，典型表现出长QT间期，出现U波，以及房速或室速性心律失常。

If they do develop dangerous tachyarrhythmias, however, they may be treated pharmacologically, but a definitive treatment is radiofrequency catheter ablation of the accessory pathway, or Bundle of Kent.

如果他们发展到了危险的快速性心律失常，应该使用药物治疗，长期治疗首选对肯特束（“旁路”）行导管射频消融术。