The cause of death for 57-year-old Patrick Muldoon, best known for starring in "Days of Our Lives" and "Melrose Place," has been released.

Muldoon's immediate cause of death was a myocardial infarction, or a heart attack, according to a death certificate obtained by Us Weekly and People. He died April 19 and was cremated April 28.

The underlying causes that contributed to his death included hereditary coagulopathy disorder, which is characterized by a slowed blood clotting process, and pulmonary embolism, which is caused by a "blood clot that breaks loose and travels through the bloodstream to the lungs," according to the National Library of Medicine's Medline Plus.

Muldoon played Austin Reed on "Days of Our Lives" and Richard Hart on the "Beverly Hills, 90210" soap spinoff "Melrose Place."

The Los Angeles native, who received two Rose Bowl rings during his time playing football for the University of Southern California, got his start as a model for Wilhelmina, where he would star in Calvin Klein ads. By the mid-'80s, he would kick off his lengthy acting career with an appearance on "Who's the Boss?" He followed up with a role on "Saved by the Bell" playing Jeffrey Hunter, the manager of The Max who briefly dated Tiffani Thiessen's Kelly Kapowski.