Prosthetic valve endocarditis is a complication of bacteremia which can cause damage to the prosthetic valve or the tissue to which it was sewn. Extensive tissue damage can result in a loss of anchoring and allow for abnormal valvular motion. Dehiscence can lead to excessive motion of the valve which is termed rocking. Through advances in imaging technology, live 3-dimentional (3-D) transesophageal echocardiography can allow for precise identification of the location of, and amount of dehiscence. We present a 37-year old male with a rocking prosthetic valve demonstrated on 3-D echocardiography and correlated to surgical manipulation.