Michael Madsen's death certificate details health issues Michael Madsen died after suffering cardiac arrest, with contributing factors including cardiomyopathy, coronary artery disease and chronic alcoholism. 18 July 2025 Michael Madsen died after suffering cardiac arrest. Michael Madsen died earlier this month The Reservoir Dogs actor was found dead at his home in Malibu, California, at the age of 67 earlier this month, and his death certificate explained his heart stopped beating due to factors including cardiomyopathy, coronary artery disease and chronic alcoholism.