Article révisé par les pairs
Résumé : The observations of surface electromaps recorded at rest and during exercise in two examplative cases are reported: the first one deals with a normal man while the second refers to a patient suffering from an old inferior myocardial infarction with bouts of angina pectoris; these surface maps are compared with myocardial scanning also performed at rest and during exercise. Special attention is devoted to the possible relation of the above described, non invasive, techniques to the anatomical description of coronary lesions as demonstrated by coronary angiography. A close relationship is found between the surface potential distribution pattern and the area of hypofixation observed on the scan as far as the presumed location of ischemic myocardial tissue is concerned. These two techniques might offer the following advantages, when used together: they are non invasive, which should result in diminishing risks and allow repeated investigations; therefore they perhaps could be better suited for population screening and follow up studies than invasive techniques such as coronary angiography; they may provide interesting clues as to the site, the extent and the evolution of damaged myocardial areas; they could also provide a more objective criterion for the selection of patients who should undergo coronarography. However, we have to take into account that these techniques are rather expensive. This is the reason why, although the first results look promising, further studies are needed.

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