Some Observations of the ST Depression in the Exercise Electrocardiogram

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Abstract
Continuous recording of the ecg during and after the double Master''s 2 step test has been done by using the EEP lead system proposed by LaDue et al. The 3 points C4, C5 and Cg were used. The propriety of the EEP central terminal was verified by the similarity of its lead vector with that of the Wilson central terminal applying Frank''s image surface. Horizontal or sagging depressions induced by exercise are always preceded by junctional depressions, in which the ST-segment draws a curve with upward concavity back to the isoelectric line, and ST depression of ischemic type returned to the zero level without pass -ing through the stage of junctional depression. The ecg taken at a few minutes after the cessation of exercise has more important values than those during exercise in respect of the ischemic depressions.