Presentation
Presentation of all types of coronary artery dominance on CT.
PDA (posterior descending artery) and PLA (posterolateral artery) arise from the right coronary artery (RCA).
PDA (posterior descending artery) arises from the circumflex artery (LCx).
PDA (posterior descending artery) arises from the right coronary artery (RCA). The second PDA arises from the circumflex artery (LCx).
LcX - Left circumflex artery, RCA - Right coronary artery.
R-PDA - Right Posterior descending artery (PDA arises from RCA), L-PDA - Left Posterior descending artery (PDA arises from LcX).
PLA - Posteriolateral artery.
Case Discussion
Coronary arterial dominance is defined by the vessel which gives rise to the posterior descending artery (PDA).
Right coronary dominance (80-85%) - PDA is supplied by the right coronary artery (RCA).
Left coronary dominance (~10%) - PDA is supplied by the left circumflex artery (LCX).
Coronary dominance (~20%) - there are two branches similar to PDA, that are supplied by RCA and LCX.
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