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.
Right after that she played Cassidy in all six seasons of Nash Bridges while also starring in films like Halloween: H20 and the teen flick She's All That as high school hottie Taylor Vaughn. O'Keefe returned to the small screen in 2007 with her role of the devious Gretchen Morgan on Prison Break.