Diagnosis of myocardial ischaemia by means of precordial ST mapping and exercise 201-thallium scintigraphy.

The authors compared the results of examination by means of exercise precordial ST mapping and exercise 201-thallium scintigraphy in 43 patients with ischaemic heart disease and in 10 controls. The methods have been found to be equally helpful in establishing the diagnosis of myocardial ischaemia. 201-thallium scintigraphy is preferred when trying to quantify the lesion and to localize it. The currently available techniques of exercise EGG mapping do not always make determination of ischaemia distribution possible. The benefits inherent in either method are their non-invasiveness and good reproducibility, features making them ideal tools for assessing the effect of treatment.