This article and video explain Interpreting a 12 Lead Electrocardiogram. Learn to look for a STEMI on a 12 lead electrocardiogram.. Electrocardiogram Lead Equipment. The diagram below illustrates approximate lead placement.. If there is an ST elevation in V 1 and V 2, the patient is having a septal STEMI. The next leads are V 3 and V 4.. In a normal R wave progression the R wave in Lead 2 should be slightly larger. R wave progression in the V leads demonstrates that the septum is healthy, absence of an R wave in V2 should make us suspicious of a septal infarct. Poor R Wave progression can indicate LBBB, Lt Ventricular hypertrophy and emphysema.
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The 12-lead ECG It is important to remember where the positive and negative electrode of. called a septal lead and V3 an anterior lead, not the same name but they. Going back to the earlier diagram of the 12-lead ECG and putting everything together on an overlaid diagram may look confusing at first but will become an excellent reference.. Numerous ECG lead systems and constellations of leads have been tested but the standard 12-lead ECG is still the most used and the most important lead system to master. The 12-lead ECG offers outstanding possibilities to diagnose abnormalities. Importantly, the vast majority of recommended ECG criteria (e.g. criteria for acute myocardial.