Fig. 1From: Perventricular double-device closure of wide-spaced multi-hole perimembranous ventricular septal defect a The direct delivery system consists of a short delivery sheath and a delivery cable. (magnification of inset 2.5 ×) b The probe-assisted delivery system consists of a hollow probe, a flexible guidewire, a delivery sheath, a loading sheath and a delivery cableBack to article page