Key result
Minnesota Code ECG classification by two independent observers shows greater reproducibility with increased experience.
Observational (n=412)
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Accurate use of the Minnesota Code for ECG classification requires substantial experience and independent reading by at least two observers.
Electrocardiograms of 412 male postmyocardial infarction patients recorded 1–2 years after their first infarction have been classified according to the Minnesota Code by two independent readers (physicians). A study of the inter‐ and intra‐observer error or reliability was then performed. The degree of accuracy and reproducibility thus obtained was related to degree of experience in the use of the Minnesota Code. Reproducibility was greater towards the end of the study when the readers were more experienced. The importance of substantial and continuous experience with the use of the Minnesota Code is stressed as well as the importance of at least two observers reading the ECGs independently. A final arbitration is no problem. These criteria must be fulfilled before the use of the Minnesota Code in clinical or epidemiological studies on coronary heart disease.
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Bjørnson et al. (1973) conducted an observational in Coronary heart disease (postmyocardial infarction) (n=412). Minnesota Code ECG classification was evaluated on Inter- and intra-observer error or reliability. ECG classification using the Minnesota Code demonstrated greater reproducibility with increased reader experience, emphasizing the need for continuous experience and at least two independent observers.
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