Foster told the NFL Network's Alex Flanagan on Thursday that he will "likely undergo" a heart ablation in about a month. An ablation involves the use of a catheter to correct structural problems that can lead to an abnormal heartbeat, according to the Mayo Clinic's official Web site.
The 26-year-old Foster left in the third quarter of Houston's 23-6 loss to Minnesota on Dec. 23 with an irregular heartbeat. Coach Gary Kubiak said after the game that Foster had also experienced the problem in a practice.
Foster rushed for 1,424 yards and 15 touchdowns in 2012.