Patrick Muldoon‘s sudden death is being linked to more than just a heart attack … newly released records show multiple serious medical conditions all collided at once.

The “Melrose Place” actor’s death certificate, obtained by Us Weekly, lists his official cause of death as a heart attack, but it also reveals he was suffering from a hereditary coagulopathy disorder … a genetic issue that disrupts the blood’s ability to clot … as well as a pulmonary embolism … a dangerous clot that can block blood flow to the lungs.

According to the Los Angeles County Department of Public Health, he was cremated on April 28.

We broke the story … Muldoon was pronounced dead after his girlfriend, Miriam Rothbart found him unconscious in the shower on April 19. His last few Instagram posts showed no signs of distress … instead showing him just living his life before his tragic passing.

Muldoon’s ex, Denise Richards, shared a heartfelt tribute after his death, calling him her “best friend & family,” while Tori Spelling remembered him as a “beautiful soul” with a quirky sense of humor.