Summary
The routine measurement of electrocardiographic time intervals is a laborious task. Heart rate, PR interval, QRS duration, QT interval and mean frontal QRS axis were measured independently in fifty consecutive out-patient electrocardiograms by two cardiologists and a medical student. Between and within observer variations were small. These measurements were compared with those of a commercially available computer assisted electrocardiograph. Correlation between the cardiologists and the computer for all measurements was very high. No systematic bias was detected. Some disagreement was noted for longer QT intervals.
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Mulcahy, D., Reardon, B., Mulcahy, R. et al. Can a computer assisted electrocardiograph replace a cardiologist for ECG measurements?. I.J.M.S. 155, 410–414 (1986). https://doi.org/10.1007/BF02940543
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DOI: https://doi.org/10.1007/BF02940543