Presentation
Chest pain
Patient Data

Origins: The LAD and LCx arise separately from the left aortic sinus (hence there is no LMCA).
Dominance: Right
Left Anterior Descending (LAD): Normal.
1st diagonal branch (D1), D2 - small vessels
Circumflex artery (Cx): Normal.
1st obtuse marginal branch (OM1) - very high origin, large vessel, normal.
OM2 - high origin also, normal
OM3, OM4 - normal
Right Coronary Artery (RCA): Normal.
Posterior descending artery (PDA) - Normal.
Posterior left ventricular branch (PLV) - Normal.
Cardiovascular Findings:
Single right sided SVC. Normal pulmonary venous connections.
Pericardial thickening.
No valvular calcification.

Curved MPR showing separate origins.
Case Discussion
The OM1 has a very high origin off the LCx - it can't be a ramus as the LCx and LAD have separate origins.