Corey Haim Corey Haim

Though a full coroner's report won't be released for some time, Corey Haim's mother told Access Hollywood that he died of an enlarged heart and fluid in his lungs.

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Judy Haim said she received a call from the Los Angeles County coroner's office letting her know her son's cause of death.

Haim, 38, was taken to a Burbank hospital where he was pronounced dead Wednesday.

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His friend and recurring co-star, Corey Feldman, acknowledged on Larry King Live that Haim had struggled with addiction for many years, but urged the public not to jump to conclusions until a full report was released.

The coroner's office did not immediately respond to's request for comment.