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From TMZWhitney Houston had cocaine in her system when she died — this according to the L.A. County Coroner.

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The L.A. County Coroner has just released the singer’s official cause of death — accidental drowning … but the report also notes heart disease and cocaine use were contributing factors to Whitney’s demise.

A source connected to the investigation tells us it is “very possible” Whitney had a heart attack that caused her to lose consciousness and drown. The heart attack may have been triggered by hardening of the arteries as a result of cocaine use.

As we previously reported, Whitney was found dead in a bathtub at the Beverly Hilton hotel last month and several pills were found on the scene — including Xanax, Ibuprofen, and Midol.

Investigators found NO EVIDENCE of cocaine in the hotel room.

Law enforcement sources have told us from the beginning they did not suspect foul play — and believe her death was not a homicide.

Her family however had doubts about Whitney’s demise — suggesting there may have been foul play.

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