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Portable Network Graphic  |  1988-04-30  |  3.0 KB  |  416x240  |  1-bit (2 colors)
   ocr: Lead I H, - - - Lead II Lead IIT - - - - a - - - / - / - - - - - - III Any combination of electrodes used in recording the EKG is called a "lead." The lead axes for Einthoven's three bipolar frontal plane leads, I, I1, and IIT are assumed to be 0, +60 and +120 degrees respectively, for positive deflections.