Figure 7: Schematic representation of the origin of the right coronary artery. In the first and third cases, right coronary artery was arising from the left sinus of Valsalva above the sinotubular junction. In all the other cases, it was below the sinotubular junction. The first, second and sixth cases were closer to the midline where we had to resort to the altered technique of guide catheter cannulation on an exchange length coronary wire