Michael Madsen's manager previously said, 'What we understand is Michael had a cardiac arrest and was found unresponsive in his Malibu home' on July 3. The 'Kill Bill' actor was 67.

Michael Madsen's cause of death has been confirmed less than a week after the veteran actor was found unresponsive in his home after years of him battling booze demons.

Madsen's doctor said heart failure will be listed as the cause of death, with heart disease and alcoholism named as contributing factors.