WASHINGTON (AP) — “My heart’s pounding,” Debbie Clemens said just before she walked into a federal courtroom to take the stand in her husband’s perjury trial.

Lawyers on both sides of the Roger Clemens case are ready for key testimony from her about her husband’s alleged use of human growth hormone as the defense nears the end of its case.

Debbie Clemens, who spent only 15 minutes on the stand Thursday fielding background questions before court recessed for the day, was to get to the crux of her testimony today.