The significance of ST-segment changes in an electrocardiogram need not be always as clear-cut as we used to think. Minor problems usually represent only the ST-segment depressions in the presence of typically manifested problems and established coronary artery disease. The same holds true for ST-segment elevations: in addition, they definitively superior to ST-segment depressions. Among other categories, silent ischemia denotes only a part of what is or can be seen. This article deals with other conditions associated with changes in ST segments and variable symptoms with changeable clinical implications.

        Key words: silent ischemia, electrocardiography, stress impact, ST segment.