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Portable Network Graphic  |  1988-04-30  |  6.1 KB  |  416x240  |  1-bit (2 colors)
   ocr: - According to Einthoven's scheme, the magni tude of the deflections in each lead is proportional to the projection of the vector representing the cardiac electrical forces upon each lead axis. More commonly the deflections measured externally are known and the magni - tude and prientation of the cardiac vector are to be determined. This may be done by constructing perpen- dicular lines from two lead axes at points determined by the amplitude (voltage) of the deflections in the corresponding leads. The intersection of these perpendicular lines determines the cardiac vector. This may be done fo ...