Article continues below advertisementPatrick Muldoon, known for his role in Melrose Place, has passed away at the age of 57. The actor's official cause of death is a myocardial infarction, which is commonly referred to as a heart attack. This information was reported by Us Weekly, which obtained documents detailing the circumstances surrounding his death.Article continues below advertisementSource: MEGAPatrick Muldoon passed away at 57 due to a heart attack, officially known as a myocardial infarction.