The actor died on Sunday, April 19

Patrick Muldoon’s cause of death has been revealed.

According to his death certificate, the Days of Our Lives and Melrose Place star died of a heart attack, technically referred to as a myocardial infarction, on April 19 at the age of 57, People Magazine reports.

Pulmonary embolism and hereditary coagulopathy were listed as underlying causes. Coagulopathy is a genetic condition where the body’s ability to form clots is impaired, which can lead to excessive bleeding or excessive clotting. A pulmonary embolism is a blood clot that blocks blood flow in a lung artery, according to the Mayo Clinic.

Muldoon was cremated on Tuesday, April 28.

The actor’s manager previously confirmed his death to Variety. Though no official cause of death was given at the time, Deadline reported that he died after suffering a heart attack.

Muldoon made a name for himself after he was cast in Saved by the Bell for a three-episode arc, where his character was infamously the catalyst for Zack and Kelly’s breakup. He went on to join popular soap opera Days of Our Lives as Austin Reed, a role he embodied from 1992 to 1995 and again from September 2011 to July 2012. He also played recurring character Richard Hart on Melrose Place for three seasons in the mid-Nineties.

In 1997, Muldoon starred in Paul Verhoeven’s beloved sci-fi film Starship Troopers alongside Casper Van Dien, Denise Richards, and Neil Patrick Harris. He continued working throughout the Nineties and 2000s, appearing in films like Born to Ride, Spiders 3D, and Saving Christmas. He also had a fruitful career in dramatic made-for-TV movies like Deadly Revenge and His Secret Past.