Clinical electrocardiography . Fig. 111.—Negative T wave in Derivations I and Fig. 112.—Negative T wave in Derivations II and III. Next in significance should be the distributions of potential, render-ing the left upper zone electronegative to the right, and representedby T wave negativity in combined Derivations I and II and incombined Derivations I, II, and III. In the distribution which ABNORMALITIES OF THE T WAVE 129 most closely approximates normal the T wave is negative in Deriva-tion III. In these cases the normal potential relationship of theright upper zone is maintained (Figs. 1
Clinical electrocardiography . Fig. 111.—Negative T wave in Derivations I and Fig. 112.—Negative T wave in Derivations II and III. Next in significance should be the distributions of potential, render-ing the left upper zone electronegative to the right, and representedby T wave negativity in combined Derivations I and II and incombined Derivations I, II, and III. In the distribution which ABNORMALITIES OF THE T WAVE 129 most closely approximates normal the T wave is negative in Deriva-tion III. In these cases the normal potential relationship of theright upper zone is maintained (Figs. 109-113). Fig. 113.—Negative T wave in Derivations I, II, and III. Clinical Consideration of T Wave Negativity.—I have recentlycompleted an analysis of 1106 cases of T wave negativity in theelectrocardiograms10: 140 instances ( per cent.) were noted inDerivation I, 688 ( per cent.) in Derivation III, 62 ( percent.) in combined Derivations I and II, 171 ( per cent.) incombined Derivations II and III, and 45 ( per cent.) in com-bined Derivations I, II, and
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