What is ‘sudden death syndrome’?
Bryan didn’t go into further detail about “sudden death syndrome” or what he learned (or hadn’t) since his sister’s passing. But medical experts say sudden arrhythmia death syndromes, or SADS, can be the result of heart conditions marked by an abnormal heartbeat, or an arrhythmia, which itself is caused by a “problem with your heart’s electrical system,” according to Cleveland Clinic.

SADS conditions are classified as sudden cardiac arrests (SCA), but affect children or younger, seemingly healthy adults.

“It is estimated that over half of the 4,000 SADS deaths each year of children, teens, or young adults have one of the top two warning signs: 1) family history — of a SADS diagnosis or sudden unexplained death (usually undiagnosed and untreated) of a family member, or 2) fainting,” the SADS Foundation explains.