‘Beverly Hills 90210’ star David Gail’s cause of death revealed: rep

David Gail, star of the “General Hospital” spinoff “Port Charles” and “Beverly Hills, 90210,” died due to complications from sudden cardiac arrest, his rep told The Post.

A spokesperson for the 58-year-old actor told The Post Monday that Gail was found unresponsive by emergency personnel who then performed CPR and defibrillation on him.

Despite their efforts, Gail was put on life support where he remained for several days and was pronounced dead on Jan. 16.

His family has no reason to suspect the cause of his death was anything but heart failure, the rep said.

“We are extremely touched by the outpouring of love from David’s dedicated fans and colleagues,” his mom, Mary, said in a statement. “We are grateful for all the support received during this very difficult time.”

Gail is also survived by his son, Guthier, and his sister, Katie.

This comes hours after TMZ reported that Gail’s death was being investigated as a possible overdose, although the outlet claimed police were unclear about what alleged substances it could have been from.

Katie confirmed his death Saturday in an Instagram post, writing, “There’s barely been even a day in my life when you were not with me by my side.”

She continued, “Always my wingman always my best friend ready to face anything and anyone w me the bears will never be the same but I will hold you so tight every day in my heart you gorgeous loving amazing fierce human being missing you every second of every day forever there will never be another.”

Gail portrayed Dr. Joe Scanlon for more than 200 episodes in “Port Charles.”

But he is perhaps best known for his role as Stuart Carson — Brenda Walsh’s (Shannen Doherty) one-time fiancé — on “Beverly Hills, 90210.”

Doherty remembered Gail in an Instagram Story Monday, sharing a throwback photo of the pair dancing together.

Gail’s other acting credits include “Growing Pains,” “Doogie Howser, M.D.,” “Murder, She Wrote” and “Matlock,” as well as “Robin’s Hoods,” “Savannah,” “The Round Table” and “JAG.”

He also starred opposite Bradley Cooper in the 2002 film” “Bending All The Rules.”