International Circulation: What is the cause of long QT syndrome inducing cardio death? How to prevent?

　　《国际循环》：长QT间期综合征易发生猝死的原因及如何预防?

　　Prof. Masayasu Hiraoka:  It depends on types of gene mutation. For example， type I patients should avoid swimming. Swimming is a very strong stimuli especially for school children. You have to ask them not to do swimming. For type II patients， when potassium level in the body becomes low， cardio events are provoked. They should keep potassium level by intaking potassium from drugs or food such as watermelons or other fresh fruits.

　　Masayasu Hiraoka教授：还是要依据基因突变的类型。例如，I型患者应该避免游泳，因为游泳是一项较强刺激尤其对于学校儿童来讲。你必须要求他们不能游泳。而II型患者来讲，当体内钾离子浓度水平变低时，心血管事件就会被诱发。他们就要通过从药物或食物如西瓜或者其他新鲜水果吸收钾离子来保持钾离子浓度水平。