Long QT syndrome
The disease has only one manifestation - sudden fainting. Any of the fainting spells can be fatal. There is an effective drug treatment for the disease, which must be combined with the mandatory limitation of physical activity. Without treatment, most patients die at a young age, without having time to leave offspring. Currently, the availability of effective treatment allows patients to live long and bear children, but they also pass on the “sick” gene to the child. That is why it is important to undergo genetic testing in order to be sure that the baby will be healthy.