Fig. 3

a, b An attempt is made to pass the Fielder FC guidewire toward the main RCA via the true bifurcation point using the Crusade catheter. c The magnified image around the re-crossing point of the third guidewire shows the three different courses of the guidewire-passing routes. d, e The OCT findings clearly show the third guidewire crossing from the nearest point of the RV branch ostium to the distal RCA through the communicating vascular lumen. d is a cross sectional image at the distance indicated with the black bar in c, f. f The outlook of the lesion with the lotus root appearance after the third guidewire re-crossing. Blue and green lines indicate the initial guidewires passing into the RV branch and main RCA, respectively. The pink line indicates the third guidewire