After a 13-year-old boy's heart failed suddenly, his family arrived at Dr. Michael Ackerman's doorstep with questions. He was determined to find them answers. Since the boy's autopsy report seemingly failed to explain his death, more than 20 of his relatives underwent genetic testing for heart conditions that could put them at increased risk of the same fate. The tests diagnosed the family members, including the boy's brother, as having a potentially deadly genetic heart rhythm condition called long QT syndrome. As a result, a heart defibrillator was surgically implanted in the brother's chest to prevent any potentially fatal heart rhythms, or arrhythmias.