Which criteria apply for the relevance of ST segment elevation in the leads v3R and v4R?
In the event of an inferior infarction, involvement of the right ventricle must always be considered. In this case, an additional ECG recording should be made, using chest leads around the free wall of the right ventricle. These additional leads are called the "right precordial leads" V3R and V4R. Here, an ST elevation of 0.05 mV or above is relevant due to the low mass of the right ventricular myocardium. In men under the age of 30 years, it must be at least 0.1 mV.
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