“Scooby-Doo” voice actress Heather North died last month after going into cardiac arrest, a death certificate reveals.
North — whose death was first reported earlier this week — suffered the heart attack as a result of a respiratory ailment called constrictive bronchiolitis, according to documents published Thursday by TMZ.
North, who voiced Daphne Blake on “Scooby-Doo for over three decades, died inside her Studio City, Calif., home on Nov. 29 at the age of 71.
Low oxygen levels also contributed to her death, the paperwork shows.
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North joined “Scooby-Doo” in 1970 — one year after its creation — and continued to voice her chic, danger-prone character in various installments to the franchise through 2003.
“Scooby-Doo” centers on a cast of mystery-solving teenagers and their dog Scooby-Doo.
In addition to her work on the animated series, North racked up gigs in front of the camera as well, including a role on the soap opera “Days of Our Lives” in the 1970s.
She met her husband H. Wesley Kenney, on the set of the NBC daytime soap, and remained married to him until his death in 2015.