The cause of Heavy D's death has been determined to be a pulmonary embolism cause by deep leg vein thrombosis, according to TMZ. The condition occurs due to a blockage of arteries in the lungs, and it's usually caused by blood clots that travel from other areas of the body.
Deep leg vein thrombosis is often a result of long periods of immobility. In Heavy D's case, his flight from Michael Jackson's tribute concert in Wales back to Los Angeles is being called into question as a possible factor. The coroner's office also shared that Heavy D suffered from heart disease. He was 44 years old.