Figure 3.

Demonstration of the guiding catheter in a heart model, without and with the bioptome. A: The original shape of the guiding catheter (Selectra 3D, 40 mm; Biotronik, Berlin, Germany) without the bioptome shows a 3-dimensional curve directed to the septum. The red mark indicates the right ventricular septum. B: Guiding catheter showing that the 3-dimensional curve is still preserved even when the bioptome exits the tip of the catheter. The red mark indicates the right ventricular septum.