Arizona Cardinals on defense JJ Watt tweeted on Sunday that he would play despite having “my heart back in rhythm” after suffering atrial fibrillation last week.

Watt’s tweet came just hours before the Arizona Cardinals are set to play the Carolina Panthers.

“I was just told that someone leaked some personal information about me and will be notified today,” Watts tweeted on Sunday. “Wednesday I went in for A-Fib, Thursday I got my heart back into rhythm, and today I’m out and about. That’s all.”

According to the NFL, Watt was recently listed as questionable for Sunday’s game with a calf injury injury report posted on Wednesday, the day he said he had atrial fibrillation.

In accordance with Mayo Clinic, Atrial fibrillation is “an irregular and often very fast heart rhythm that can lead to blood clots in the heart.” Atrial fibrillation increases the chance of stroke, heart failure and other heart-related complications, the Mayo Clinic said.