Figure legend
Fig.1 A Connection between AcQCross™️ Qx to a pressure line and a contrast agent by an Y connector; B Left atrial pressure detected by pressure line after transseptal puncture.
Fig.2 A Protrusion of the hollow stainless steel needle and effective puncture of the fossa ovalis after sheath’s tenting;B guidewire positioning into the left superior pulmonary vein;C steerable sheath’s direct advancement into the left atrium over the wire; D AcQCross™️ Qx withdrawal after transseptal puncture.