An autopsy performed on Heavy D has revealed his cause of death to be a pulmonary embolism. The Los Angeles County coroner's office found that the rapper died of a blood clot in his lung, and also suffered from a deep leg vein thrombosis and heart disease at the time of his death.
The blood clot was "most likely formed during an extended airplane ride," said Craig Harvey, chief of the Los Angeles County department of coroner. The rapper had just recently returned to L.A. from London before his death on November 8th.
Heavy D's death was initially reported to be connected to pneumonia. A toxicology report after his passing showed the presence of medication for this illness in his system, but only on a therapeutic level.