Seeing the heart with sound.  Ultrasound-based echocardiograms yield ultra images of the heart.
D025401:Echocardiography, Stress / Q000379:methods; D017548:Echocardiography, Transesophageal / Q000379:methods; D006321:Heart / Q000033:anatomy & histology / Q000503:physiopathology*; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D018608:Ultrasonography, Doppler / Q000379:methods