Nicholas Brendon’s cause of death has been confirmed nearly two months after the actor died at age 54. According to Us Weekly, an autopsy report listed atherosclerotic and hypertensive cardiovascular disease as the primary cause, with acute pneumonia and a previous myocardial infarction listed as contributing factors. The report also stated that the mechanism of death was a 90 percent blockage of Brendon’s right coronary artery. His death was ruled natural, adding medical context to the loss of the actor who played Xander Harris throughout all seven seasons of Buffy the Vampire Slayer.
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Nicholas Brendon Died in His Sleep at 54
The actor’s family first announced his death in March, sharing that he died in his sleep of natural causes. “We are heartbroken to share the passing of our brother and son, Nicholas Brendon,” his family told Us Weekly. In the same statement, they reflected on his life beyond acting, saying he had developed a deep passion for painting and art in recent years. They described him as passionate, sensitive and driven to create, while also asking for privacy as they mourned and honored his life.
Autopsy Report Lists Heart Disease and Pneumonia
The newly reported findings give a clearer medical explanation. Atherosclerotic disease involves narrowed arteries, while hypertensive cardiovascular disease is linked to long-term high blood pressure. Acute pneumonia was also listed as a contributing condition, along with a previous heart attack. The report noted severe blockage in one coronary artery, a critical detail in determining how he died. While the coroner’s office is still awaiting toxicology results, officials previously said there were no signs of foul play and nothing at the scene suggested anything other than a natural death.
Buffy Cast Members Share Tributes to Brendon
After news of his death, several of Brendon’s former castmates posted tributes on social media. Actor Sarah Michelle Gellar shared a message that referenced their years together on the series and one of Xander’s memorable lines. Actor David Boreanaz also reflected on their working relationship and the quieter moments that stayed with him over time. “There are people you work with and then there are people you share time with, Nick was the latter,” said Boreanaz according to Us Weekly. Their posts added a personal note to the public mourning around Brendon’s death.
Nicholas Brendon’s Role as Xander Harris Endures
Brendon remained closely tied to Buffy the Vampire Slayer, where he played Xander Harris from 1997 to 2003 alongside Gellar, Alyson Hannigan and Boreanaz. The series followed Buffy Summers as she balanced teenage life with fighting supernatural threats, and Xander became one of its most recognizable human characters. Brendon’s performance gave the show humor, vulnerability and loyalty at key moments. His family’s statement also pointed to another side of his life, emphasizing that his artwork reflected who he was away from the screen and close to those who knew him best.
