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.

Madsen died from cardiac arrest, his manager Ron Smith told NBC News. Cardiac arrest occurs when the heart stops functioning. It can lead to death without immediate treatment, according to Mayo Clinic.

Hollywood actor Michael Madsen, whose film career spanned decades and included roles in “Reservoir Dogs,” “Kill Bill” and “Donnie Brasco,” died from heart failure, his cardiologist told NBC Los Angeles.