ECG is poor detecting ischemia in areas supplied by wich of the following vessels-
Left anterior descending (LAD)
Left circumflex (LCx)
Left Coronary Aery (LCA)
Right Coronary Aery (RCA)
Occlusion in the left circumflex aery ECG changes resemble those seen in posterior infarction due to occlusion in the RCA, namely ST-segment elevations in V7-V9 and reciprocal ST-segment depressions in V1-V3, along with high R-waves and positive T-waves in the same leads (V1-V3).but it is poorly detected on ECG Ref Davidson edition23rd pg 460
C.V.S