United Kingdom, July 9 -- Michael Madsen died from heart failure.

The Reservoir Dogs actor was found dead at his home in Malibu, California, at the age of 67 last week, and his cardiologist has now confirmed the cause of his passing.

The unnamed doctor told NBC4 Los Angeles that heart failure will be listed as Michael's cause of death, with heart disease and alcoholism named as contributing factors.

An autopsy will not be conducted because the Kill Bill star's cardiologist signed the death certificate, and the Los Angeles Sheriff's Department has closed its investigation into Michael's death and listed it as being due to natural causes.

Michael was found unresponsive in the early hours of 3 July when deputies responded to his home aft...