Figure 61-4 Right atrium during echocardiography. A, Multiple, small emboli in the right atrium. B, A large embolus (7 cm long), which is probably a cast of the femoral vein. (Adapted from Christie J, Burnett R, Potts HR, et al: Echocardiography of transatrial embolism during cemented and uncemented hemiarthroplasty of the hip. J Bone Joint Surg Br 76:409–412, 1994.)