Coronary care unit ST-trending system: interpreting complex output data

Analysis of the ST segment is an accepted part of the assessment of coronary ischaemia. Traditionally, such analysis has been applied to 12-lead surface electrocardiograms, but it is increasingly applied to 24-hour Holter recordings and bedside monitoring systems, using complex computer algorithms. There is a potential for results to be misleading as a consequence of uncritical acceptance of complex medical data processing.