An autopsy performed on rapper Heavy D, who fell out and died all of a sudden on Nov. 8, discovered that the cause of death was a pulmonary embolism, this according to The Los Angeles Times.

The coroner’s office found that Dwight Arrington Myers, better known by his stage moniker Heavy D, passed away of a blood clot in his lung. Concurrently, he also suffered from deep leg vein thrombosis and heart disease.

According to Los Angeles Times, stress from flying may have contributed to 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 recently returned from a trip to London.

Many folks speculated that the it the legendary rapper and bit-actor suffered from pneumonia, causing of his abrupt death. A toxicology report found the presence of mediation in Heavy D’s system, but it was at a therapeutic level.

“He was treating himself with cough syrup,” Harvey said. “But it was not contributory [to his death].”

He died at Cedars-Sinai Medical Center after collapsing outside his Beverly Hills home after returning from a shopping trip.

Before collapsing, he had seen a private physician for a cough that some said may have been pneumonia.

When they arrived, the rapper was conscious and breathing, but he died at the hospital.