Figure 32.15

(a) BSPM of a patient with angina and normal resting ECG. The map refers to the early ST interval, as indicated by the vertical line crossing the ECG. This potential pattern lasted about 200 ms. Potential values are expressed in millivolts. (b) BSPM at the instant indicated by the vertical line crossing the ECG, in a patient with angina but normal T waves on the resting ECG. The map shows a complex potential distribution with one maximum and two minima.