Michael Madsen’s doctor is confirming the actor’s cause of death, less than a week after the “Reservoir Dogs” star died. He was 67.

Actor Michael Madsen died from heart failure, his cardiologist has confirmed. The Reservoir Dogs star's doctor told NBC4 Los Angeles that heart disease and alcoholism will be named as contributing factors on the death certificate.

Michael Madsen, who was found unresponsive in his Malibu home on July 3, died from heart failure, with heart disease and alcoholism as contributing factors, his rep said.