fig4

Figure 4. Steering and positioning the clip in the left atrium. A: anatomical specimen (pig heart) showing the steering of the clip towards the MV: reference landmarks are LAA and Ao; B: biplane imaging guiding the steering towards the MV: commissural view for medio-lateral and LAX view for postero-anterior guidance; C, D: 3D overhead perspective of the LA with (C) and without (D) color guiding the steering and the positioning of the device. DC: Clip delivery catheter; LAA: left atrial appendage; LA: left atrium; Ao: aortic root/valve; MV: mitral valve; LAX: long axis