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Click 62 years old male patient with single right coronary artery. Cathether Aortogram (Philips FD10, LAO 45, CAU 1; WL 116 , WW 239 ) shows single ostium with single right coronary artery and absent left coronary ostium.

Click 62 years old male patient with single right coronary artery. RCA cathether angiogram (Philips FD10, LAO 45, CAU 1; WL 116 , WW 239) showing single right coronary artery with the hypertrophied conus branch. First septal and second septal branches

Click 62 years old male patient with single right coronary artery. VR reconstruction of CT coronary angiography (128-slice Philips, Ingenuity Low dose CT at a mean heart rate of 55beats/ min. after stabilizing using a beta- blocker and an anxiolytic. 80ml of 350mgI/ml non- ionic contrast (Ioversol) was injected at a flow rate of 5.5ml/sec using dual head Medrad injector followed by a saline chase of 30ml at the same rate. The scan was done at 120kv, 1000mAs, 0.4mm detector at a pitch of 0.2 with ECG- gated dose modulation and retrospective gating) shows RCA with first septal and the second septal branch from the proximal and distal PDA respectively and forming the proximal LAD and distal LAD. Mid LAD is absent.

Click 62 years old male patient with single right coronary artery. Post contrast axial thick slab MIP(14.8mm, WW 558, WC 242, 128-slice Philips, Ingenuity Low dose CT at a mean heart rate of 55beats/ min. after stabilizing using a beta- blocker and an anxiolytic. 80ml of 350mgI/ml non- ionic contrast (Ioversol) was injected at a flow rate of 5.5ml/sec using dual head Medrad injector followed by a saline chase of 30ml at the same rate. The scan was done at 120kv, 1000mAs, 0.4mm detector at a pitch of 0.2 with ECG- gated dose modulation and retrospective gating) shows RCA with the hypertrophied conus branch coursing further to form the proximal LAD

Click Cathether angiogram (Philips FD10, RAO 5, CAU 44; WL 116 , WW 239) shows LMA dividing into LAD and LCX

Click Cathether angiogram (Philips FD10, LAO 45, CAU 1; WL 116, WW 239) showing RCA arising from LMA and stenosed PDA

Click 79 years old male patient with single left coronary artery. VR reconstruction of CT coronary angiography (128-slice Philips, Ingenuity Low dose CT at a mean heart rate of 60 beats/ min. after stabilizing using a beta- blocker and an anxiolytic. 80ml of 350mgI/ml non- ionic contrast (Ioversol) was injected at a flow rate of 5.5ml/sec using dual head Medrad injector followed by a saline chase of 30ml at the same rate. The scan was done at 120kv, 1000mAs, 0.4mm detector at a pitch of 0.2 with ECG- gated dose modulation and retrospective gating) shows RCA arising from the LMA and the RCA has a interarterial course.

Click Cathether angiogram(Philips FD10, LAO 45, CAU 1; WL 116, WW 239) shows LMA giving rise to RCA

Click 79 years old male patient with single left coronary artery. Post contrast axial MIP(0.8mm, WW-795, WC-374) of CT coronary angiography (128-slice Philips, Ingenuity Low dose CT at a mean heart rate of 60 beats/ min. after stabilizing using a beta- blocker and an anxiolytic. 80ml of 350mgI/ml non- ionic contrast (Ioversol) was injected at a flow rate of 5.5ml/sec using dual head Medrad injector followed by a saline chase of 30ml at the same rate. The scan was done at 120kv, 1000mAs, 0.4mm detector at a pitch of 0.2 with ECG- gated dose modulation and retrospective gating) shows RCA arising from the proximal part of the LMA