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Previous Volume 343:511-512 August 17, 2000 Number 7 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: Buchthal et al. (March 23 issue)¹ report an abnormal, reversible decrease in the myocardial phosphocreatine:ATP ratio during mild handgrip exercise, a finding suggestive of ischemia, in 7 of 35 women with angina and no angiographically significant coronary stenoses and in 4 of 11 patients with critical stenoses. This observation was made possible by the application of myocardial phosphorus-31 nuclear magnetic resonance spectroscopy, which appears to have sufficient sensitivity to detect metabolic ischemic alterations in the anterior cardiac wall in the absence of ischemic ST-segment changes. However, the finding of a positive response in only 20 percent of . . . [Full Text of this Article]

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