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Routine exercise testing or thallium-201 scintigraphy for prediction of cardiac events post-myocardial infarction?

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Abstract

The efficacy of 12 lead exercise testing and rest/exercise 201Tl scintigraphy as indicators of coronary anatomy and prognosis was compared in 46 low risk survivors of acute myocardial infarction. The non invasive procedures were performed at discharge, and cardiac catheterization was performed six weeks post discharge. On exercise testing, ST depression in leads remote from the site of infarction was considered to indicate multivessel disease and reversible ischaemia. On 201Tl scintigraphy, a perfusion defect remote from the site of infarction indicated multivessel disease, while a defect which reperfused at rest indicated reversible ischaemia. During the mean follow-up of 13±3 months, 14(30%) patients experienced cardiac events. Thallium scintigraphy was a more sensitive, but less specific, indicator of multivessel disease than exercise testing. Both exercise testing and 201Tl scintigraphy had a similar sensitivity (79% vs 79%), specificity (78% vs 88%) and predictive accuracy (78% vs 85%) for predicting subsequent cardiac events. Thus, in our patient population, 201Tl scintigraphy could not be demonstrated to be superior to routine exercise testing in low risk patients post myocardial infarction.

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Murray, D.P., Murray, R.G., Rafiqi, E. et al. Routine exercise testing or thallium-201 scintigraphy for prediction of cardiac events post-myocardial infarction?. Eur J Nucl Med 13, 274–277 (1987). https://doi.org/10.1007/BF00256548

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  • DOI: https://doi.org/10.1007/BF00256548

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