Carrying a black canvas bag and wearing a dark blue shirt, Yeung Chin-kwun looks like any other boy hanging out in the park. Except the bag contains five pounds of medical equipment, and the young heart underneath his shirt cannot beat by itself.
The 12-year-old Hongkonger has a mechanical pump made of metal – a ventricular assist device, or VAD – implanted in his chest.
“He was born with heart disease,” his father, who declines to be named, explains. “It’s a...
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