Actor Michael Madsen died at the age of 67 from heart failure, his personal cardiologist confirmed to NBC Los Angeles.

The doctor confirmed that Madsen's cause of death would be listed as heart disease and alcoholism named as contributing factors, however, no autopsy will be conducted because the cardiologist treating the actor signed the death certificate and the case is considered closed by the Los Angeles Sheriff's Department. Foul play isn't indicated and Madsen's death was listed as stemming from natural causes.

Madsen, best known for roles in Reservoir Dogs and Kill Bill: Vol. 2, died after suffering cardiac arrest last Thursday (July 3) morning, his managers Ron Smith and Ron Smith and publicist Liz Rodriguez, confirmed to in a statement to CBS News.

"In the last two years Michael Madsen has been doing some incredible work with independent film including upcoming feature films Resurrection Road, Concessions and Cookbook for Southern Housewives, and was really looking forward to this next chapter in his life," managers Susan Ferris and Ron Smith and Publicist Liz Rodriguez said in a statement.

"Michael was also preparing to release a new book called Tears For My Father: Outlaw Thoughts and Poems currently being edited. Michael Madsen was one of Hollywood's most iconic actors, who will be missed by many," they added.

Madsen was a frequent collaborator with director Quentin Tarantino, which included appearing in the iconic 'Stuck in the Middle' Reservoir Dogs torture scene, as well as Kill Bill: Vol. 2, The Hateful Eight, and Once Upon a Time in Hollywood, as well as the films WarGames, The Natural, The Doors, Thelma & Louise, Free Willy, Species, Donnie Brasco, Die Another Day, Sin City and Scary Movie 4, as well as voiceover work for various video games including Grand Theft Auto III, Narc, Crime Boss: Rockay City and the Dishonored series.

Adam