Figure 32.2

Integral maps in a normal subject during the QRS interval (top) ST-T interval (middle) and QRST interval (bottom). The left half of each map represents the anterior face of the thorax, the right half represents the posterior face. Continuous dark lines represent positive isointegrals, dashed lines represent negative isointegrals. The grey continuous line represents the zero integral line. The legend under each map indicates by ( + ) the maximum integral value on the respective map, by ( − ) the minimum integral value and (:) the gradient between isointegral lines, in 10 mVms.