Houston Texans running back Arian Foster is expected to undergo a heart procedure in about a month, according to Alex Flanagan. It would consist of a heart ablation to fix the problem that forced him to the sidelines during the Texans’ Week 16 matchup against the Minnesota Vikings due to an irregular heartbeat.

Foster told Flanagan that he’s been aware of the heart issue since he was 12 years old. He estimates that he’s experienced around eight incidents where his heart has “raced irregularly” over the years. Week 16 marked the first time he experienced such an incident during a football game.

This prompted Foster to start discussing with doctors how the issue could be fixed. It generally results in him having a shortness of breath, but he’s unsure what triggers the condition. He believes it may be related to stress, but this hasn’t been confirmed.

The condition hasn’t stopped Foster from becoming one of the NFL’s top rushers. Last season he ran 351 times for 1,424 yards and 15 touchdowns, while catching 40 passes for 217 yards and two touchdowns.