At the University of Louvain, Belgium it has been developed a stand-alone unit for the processing of exercise electrocardiograms (XECG). This system performs the on-line analysis of multistage maximal XECG's, with computation of probability of the coronary artery disease (CAD) being available in few minutes after completion of the test.
Fesler, R., Robert, A., Derwael, C., Brohet, C., & Detry, J.-M. (1992). Microprocessor-based Louvain system for exercise ECG analysis and interpretation. Mathematical Methods in the Applied Sciences, 109(n\a), 23-28. https://hdl.handle.net/2078.5/90387 (Original work published 1992)