ABSTRACT
Check all recordings for paper speed (25 mm/s) and sensitivity (1 mV/cm). A 12lead ECG has three bipolar limb leads (I, II, and III), three unipolar limb leads (aVR, aVL, and aVF), and six unipolar chest leads (V1-6). The lead positions are shown in Chapter 20 (Figure 20.7). Definitions of the various named components of the ECG are shown in Figure 47.1.
