n Cardiovascular Journal of South Africa - The ECG : what is 'normal'? : editorial

Volume 14, Issue 1
  • ISSN : 1680-0745



Extracted from text ... Many errors of clinical interpretation have arisen (and no doubt may continue to arise) from a failure to recognise the variability that is characteristic of man in all his measurable features. Such variability between one person and another is clearly a necessary and distinctive attribute of life. How then in this situation can we define a "normal" value? On what point of the scale should we begin to regard them as abnormal, i.e. pathological? Sir Austin Bradford Hill, 19771 The above quote identifies a problem common to medicine and life in general. 'Normality' is partly a statistical concept, but also ..

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