What do you have to consider if you suspect ischemia of the posterolateral wall?
The posterior wall is not assessed in a conventional 12-lead ECG. Although ST depression can occur in V1 and V2, we still need "additional cameras" for an exact diagnosis. Thus, in the case of a suspected posterior infarction, leads V7 to V9 are recorded as a continuation of the regular chest leads. It is important to note that in leads V7-9, ST elevations above 0.05 millivolts are considered clinically relevant. In men aged younger than forty, elevations of 0.1 millivolts or above are considered significant.
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