Simmons’ longtime lawyer, Murray Richman, said Sunday that the rapper was admitted to the intensive care unit but he was not sure what caused the heart attack.
DMX made his rap debut in 1998, and has released seven albums in a career that has included three Grammy nominations. He also acted in several movies.
But substance abuse has been a struggle for him over the years, including in 2019 when he canceled shows to go to a rehabilitation facility.
Nevertheless, he retained his standing among fans. An online face-off last year with fellow rapper Snoop Dogg as part of the Verzuz series brought more than 500,000 viewers.