Figure 8: Right coronary angiogram in a patient with TOF and anomalous origin of the LAD from the RCA performed during inflation of a dilation balloon in the RV-PA conduit. The LAD is compressed by the balloon indicating that this patient is not a candidate for percutaneous valve implantation. This maneuver is performed routinely prior to placement of a stent or catheter implanted valve. A AP view. B Lateral view.