RESUMO
In various clinical forms of coronary disease, vectorcardiographic changes are mostly dependent on the depth and spread of necrotic and dystrophic myocardial changes. In ischemia, T wave only changes its trend, while in small-focus dystrophies and necrosis, it changes both in terms of trend and shape, and in limited myocardial infraction, changes in T shape and trend are combined with those of QRS complex. The more profound and expanded the necrotic changes, the more pronounced are spatial, phasic and morphological changes in QRS and T waves, while the ratio of T and QRS are-as (AT/AQRS) exceeds 60%. Vectorcardiograms showing simultaneous morphological, phasic and spatial changes in QRS and T waves, with DI (dynamic index of electrical activity) exceeding 60% in records from 2 and more leads, indicate marked necrotic myocardial changes and poor prognosis for the outcome of acute myocardial infarction.
