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Portable Network Graphic  |  1988-04-30  |  3.5 KB  |  416x240  |  1-bit (2 colors)
   ocr: The Einthoven lead system was +aUR - - - - I - +aVL more These extended leads have by in angles the addition of frontal of -150, three plane. - - - These are aUR, avl, and aUF. -300 and +1 - +90 degrees. Note -90° ell!! t180°. 00 EKG axis angles +IIT +IT are measured this +90° +aVF way!!