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. 1999 Jan;81(1):17–24. doi: 10.1136/hrt.81.1.17

Exercise four hour redistribution thallium-201 single photon emission computed tomography and exercise induced ST segment elevation in detecting the viable myocardium in patients with acute myocardial infarction

H Yamagishi 1, K Akioka 1, M Takagi 1, A Tanaka 1, K Takeuchi 1, J Yoshikawa 1, H Ochi 1
PMCID: PMC1728918  PMID: 10220539

Abstract

Objective—To investigate the specificity and sensitivity of the combination of redistribution in exercise thallium-201 single photon emission computed tomography (SPECT) and exercise induced ST elevation for detecting the viable myocardium in patients with acute myocardial infarction.
Design—37 patients were studied within seven weeks of onset of Q wave myocardial infarction (anterior in 22, inferior in 15). All patients underwent exercise four hour redistribution thallium-201 SPECT and positron emission tomography using fluorine-18-fluorodeoxyglucose (FDG) and nitrogen-13 ammonia under fasting conditions.
Results—Sixteen patients showed exercise induced ST elevation ⩾ 1.5 mm, and 15 of these had increased FDG uptake in the infarct region. Eleven of 16 patients (10 of 11 patients with anterior infarctions) with irreversible thallium-201 defects and increased FDG uptake showed exercise induced ST elevation. The sensitivity, specificity, and predictive accuracy of redistribution, exercise induced ST segment elevation, or both for detecting increased FDG uptake were 82%, 75%, and 67% (94%, 75%, and 91% for anterior infarctions), respectively. 
Conclusions—In patients with acute Q wave myocardial infarction, the combination of redistribution in exercise thallium-201 SPECT and exercise induced ST elevation can detect the viable myocardium in the infarct region with high sensitivity and specificity, especially in patients with anterior infarctions.

 Keywords: acute myocardial infarction;  viability;  exercise induced ST elevation;  exercise thallium-201 SPECT

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Figure 1  .

Figure 1  

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Schematic diagram of nine segments of the left ventricle.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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