Cardiac Records, founded in 1995 by producer and musician Dan O'Connor in New York City, emerged as a significant player in the underground music scene. Initially focused on alternative rock and indie genres, the label gained recognition for its eclectic roster, which included notable artists such as The New Year, The Appleseed Cast, and The Casket Lottery. Throughout the late 1990s and early 2000s, Cardiac expanded its reach into post-rock and emo, fostering a community of innovative musicians. The label's commitment to artistic integrity and its support for emerging talent solidified its reputation within the indie music landscape. By the mid-2000s, Cardiac began to diversify its catalog, exploring electronic and experimental sounds. Although it has since scaled back operations, Cardiac Records left a lasting legacy, influencing subsequent generations of independent labels and artists, and remains a respected name in the history of American indie music.