In the days following his sudden death, which stunned the entertainment world, Patrick Muldoon’s cause of death has now been officially confirmed. According to a death certificate obtained by People magazine, the beloved “Melrose Place” alum died of myocardial infarction, commonly known as a heart attack, on April 19.
Muldoon Lived With Hereditary Coagulopathy—What Does the Genetic Condition Mean?
The report obtained by People also outlined additional medical conditions that contributed to his death.
Among them was pulmonary embolism, a serious condition in which a blood clot blocks an artery in the lungs. Hereditary coagulopathy was also listed, a genetic disorder that affects the body’s ability to form blood clots properly.
Cleveland Clinic explains that coagulopathy occurs when the body cannot form blood clots properly due to issues with clotting proteins. These problems are often linked to bleeding disorders such as hemophilia and von Willebrand disease.
According to the CDC, treatment typically includes therapies such as fresh-frozen plasma and clotting factor concentrates to replace missing proteins and restore normal clotting function.
Together, these underlying factors contributed to the fatal cardiac event.
Death Certificate Details Final Arrangements and Personal Life
According to official records from the Los Angeles County Department of Public Health, accessed by US Weekly and TMZ, Muldoon’s remains were cremated on April 28. The death certificate listed his profession as an actor and producer and noted that he was never married.
News of his death was first confirmed by his manager in a statement to Variety.
At the time, Deadline reported that he had died suddenly following a heart attack.
Muldoon’s Final Days Included New Project and Personal Milestones
In his last Instagram post, Muldoon shared a glimpse of his excitement for what lay ahead, announcing an upcoming film 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,” he wrote.
Muldoon was credited as an executive producer on the project, which features a star-studded cast.
He was best known for his role as Austin Reed on “Days of Our Lives” from 1992 to 1995, later returning to the series in 2011. He also played Richard Hart on “Melrose Place” and appeared in “Saved by the Bell” and the cult favorite “Starship Troopers.”
His sister, Shana Muldoon-Zappa, shared an emotional tribute a day after his death, sharing his family’s grief and the love they continue to hold for him.
“Today we woke up and realized yesterday was not just a bad dream. Thank you for the outpouring. We are in shock.”
Her message captured both the heartbreak of the loss and the overwhelming support from those who knew him.
“Those that knew my brother knew he IS the brightest light in every room, in any moment, on any day. I believe he is continuing to be so in spirit.”
Through her words, she remembered him as a constant source of joy and warmth.
“I don’t have words at this time other than I choose to remember him like this from just Easter Sunday. In his most authentic self- singing, bringing joy and magic, and surrounded with those he loved.”
At the time of his death, Muldoon was in a relationship with Miriam Rothbart. In an August 2025 post, he celebrated his relationship with a heartfelt photo post on Instagram.
“My girl. Two years 2gether today from the night this picture was taken, where I got you drunk enough to become my girlfriend,” he wrote. “Thank u 🙏 my ❤️.”
Rothbart has not publicly commented following his passing.
