The cause of Patrick Muldoon's demise has been revealed. The actor, who gained fame for his role in "Melrose Place," passed away on April 19 due to a myocardial infarction, commonly known as a heart attack, according to the death certificate viewed by PEOPLE. The document also lists pulmonary embolism and hereditary coagulopathy as underlying causes. Coagulopathy is a genetic condition that affects blood clotting, while a pulmonary embolism is a blood clot that obstructs blood flow to an artery in the lung, according to the Mayo Clinic.
Muldoon's remains were cremated on Tuesday, April 28, as stated in the death certificate. The document lists his occupation as an actor and producer. His manager previously confirmed his death in a statement to Variety, revealing that the "Days of Our Lives" actor died unexpectedly on Sunday, April 19, following a heart attack, as reported by Deadline at the time.
The actor shared an Instagram post two days before his death, expressing his excitement about his new crime thriller "Kockroach," starring Chris Hemsworth and Taron Egerton. Muldoon was credited as an executive producer on the project. "So excited to be a part of this amazing project KOCKROACH directed by Matt Ross starring Chris Hemsworth, Taron Edgerton, Zazzie Beetz and Alec Baldwin," Muldoon wrote in the caption.
Muldoon is most notably remembered for playing Austin Reed on "Days of Our Lives" from 1992 to 1995 and reprising his role after a 16-year hiatus in 2011. He also starred as Richard Hart in "Melrose Place" for three seasons until 1996. Other notable works include a three-episode stint on "Saved by the Bell" and his performance as Zander Barcalow in the 1997 cult classic "Starship Troopers."
Several former costars paid tribute to Muldoon on social media following news of his death, including "Days" costars Alison Sweeney and Lisa Rinna. Rinna, who played his on-screen sister Billie Reed, shared a picture of the pair with a broken-heart emoji on her Instagram Stories. Sweeney, who played Samantha "Sami" Brady on the soap since 1993, reflected on the "heartbreaking news" in a post shared on X.
"Pat was a rare kind of person—brilliantly talented, endlessly kind, and generous in spirit," Sweeney, 49, wrote. "I was so lucky to have worked with him when I first started at Days; he made me feel at ease right away." She added, "He brought his unique charm and humor to work every day. A truly gifted guy, and one who will be profoundly missed."
Muldoon is survived by his partner, Miriam Rothbart, along with his parents, Deanna and Patrick Muldoon Sr.; his sister and brother-in-law Shana and Ahmet Zappa; niece Halo and nephew Arrow Zappa, per Variety.
