Wolff–Parkinson–White syndrome (WPW) is one of several disorders of the electrical system of the heart that are commonly referred to as pre-excitation syndromes.
In a heart affected by WPW syndrome, however, an extra electrical pathway can interfere with the normal heartbeat. ... If it's left untreated, the abnormal heartbeat, can cause blood pressure, heart failure, and even death.
WPW can cause death.
I don't know how many people who have had it and died from it, but I hope the other information helps!