Figure 4.

Case #3. (A) Dual injection demonstrated a long, calcified CTO lesion in the mid-RCA, with a blunt proximal cap and collaterals from the LAD (arrows). (B) An initial retrograde wiring attempt failed despite the use of multiple guidewires in combination with the Corsair microcatheter (Asahi Intecc Co.). (C) Retrograde contrast injection showed a distal contained perforation without clinical consequences (arrow). A switch to an ADR strategy was made. (D) Knuckled Pilot 200 guidewire to advance further down the subintimal space. (E) The CrossBoss followed up to the distal target zone. (F) Stingray re-entry was performed using the Stingray LP catheter and guidewire. (G) The RCA was successfully stented after lesion pre-dilatations.