Instagram/Patrick Muldoon Celebrity Patrick Muldoon's cause of death confirmed: Heart attack. The Days of Our Lives and Melrose Place actor died at 57, with pulmonary embolism and hereditary co... April 30, 2026 AceShowbiz - Patrick Muldoon's cause of death has been officially confirmed as a heart attack. The actor, known for his roles on Days of Our Lives and Melrose Place, passed away on April 19 at the age of 57, according to his death certificate obtained by People Magazine. The certificate cites a myocardial infarction, the medical term for a heart attack, as the primary cause of death.