An official for the L.A. County Coroner's Office just stated ... Whitney Houston used cocaine immediately prior to her death.
Coroner Chief Craig Harvey just held a news conference -- claiming the toxicology results suggested Whitney was a "chronic" cocaine user.
Harvey described the cocaine level in Whitney's system as "acute" -- indicating Whitney used the drug not long before she accidentally drowned in a bathtub at the Beverly Hilton hotel last month. "Accidental drowning" is listed as Whitney's official cause of death.
According to Harvey, the autopsy revealed a 60% narrowing of Whitney's arteries -- a direct result of the chronic cocaine use. Harvey claims the artery constriction led to a cardiac event before her death.
As for the other drugs in her system -- marijuana, Benadryl, Flexeril, and Xanax -- which Harvey claims were all at or below therapeutic levels ... and did not significantly contribute to her death.
L.A. County Coroner
Whitney Was Coked Up
At Time of Death
3/22/2012 4:18 PM PDT BY TMZ STAFF
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