The most common causes for a weak or absent pulse are cardiac arrest and shock. Cardiac arrest occurs when someoneâs heart stops beating. Shock happens when someoneâs body begins to shut down. This causes a weak pulse, rapid heartbeat, shallow breathing, and unconsciousness.
She appeared in Prison Break in 2006 as Nika Volek, a role which she continued to portray in the show's second season. Also in 2006, Valance appeared in the National Lampoon comedy Pledge This!, alongside American socialite Paris Hilton.
O'Keefe has said that she truly loved playing the part of her Prison Break character Gretchen Morgan, because it challenged her, and because Gretchen was the polar opposite of her and was badass. In 2014 O'Keefe was cast in a recurring role in VH1's TV series Hit the Floor, and appeared in the film Merry ExMas.