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Necessary cookies are absolutely essential for the website to function properly. In addition to the three standard limb leads and the three augmented limb leads that view the electrical activity of the heart from the frontal plane, there are six precordial, unipolar chest leads….Electrocardiogram Chest Leads (Unipolar) Leads Lead aVL, I and –aVR are called lateral limb leads, because they primarily observe the lateral wall of the left ventricle. Lead II, aVF and III are called inferior limb leads, because they primarily observe the inferior wall of the left ventricle (Figure 18, coordinate system in upper panel). The Two-Fer Rule means you need two leads looking at the same area of the heart to show the same problem. For contiguous leads, I came up with my “Two-Fer” rule. They are all touching, and in the same general region (like the left ventricle, for example). What does 2 contiguous leads mean?Ĭontiguous leads are next to each other, anatomically speaking. Three of these leads are easy to understand, since they are simply the result of comparing electrical potentials recorded by two electrodes one electrode is exploring, while the other is a reference electrode.
The 12-lead ECG displays, as the name implies, 12 leads which are derived by means of 10 electrodes. In this study, results of V2-V1 bipolar precordial derivation V2-V1 (right to left) and its relationship with the anteroposterior axis are presented. Bipolar precordial leads, like unipolar precordial leads, are greatly influenced by local electric activity and magnify focal electric phenomena.
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