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Abstract
The ST-T segment of the surface ECG reflects cardiac repolarization, and is quite sensitive to a number of pathologtcal conditions, particularly ischaemia. ST-T changes generally affect the entire waveshape, and are inadequately characterzied by single features such as depression of the ST segment at one particular point. Metrics which represent overall waveshape should provide more sensitive indicators of ST-T wave abnormalities, particularly when they are subtle, intermittent or periodic. This study discusses a Karhunen-