title: Needle in the heart: two-dimensional echocardiographic findings.
mesh_terms: D000293:Adolescent; D006348:Cardiac Surgical Procedures; D004452:Echocardiography / Q000379:methods*; D005547:Foreign Bodies / Q000175:diagnosis* / Q000601:surgery; D006321:Heart; D006801:Humans; D008297:Male; D012559:Schizophrenia / Q000150:complications