Key result
Tc-99m tetrofosmin myocardial scintigraphy after dipyridamole infusion demonstrated a rare reverse perfusion pattern with ST segment depression in a patient with unstable angina.
Case Report (n=1)
Highlights a rare case of reverse perfusion pattern using Tc-99m Tetrofosmin in a patient with unstable angina and normal coronary arteries.
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Reverse perfusion on dipyridamole Tc-99m tetrofosmin scintigraphy may occur in unstable angina; single case leaves open its prevalence and diagnostic value.
Reverse redistribution is a well-known pattern found when performing thallium myocardial scintigraphy, and it has been implicated as an indicator of myocardial ischemia. Much more rarely, when using technetium compounds, which do not redistribute, a similar pattern is noted after the second injection of the radiotracer. This pattern has been termed "reverse perfusion pattern," and its full implications are not yet clear and are still being investigated.
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Antonopoulos et al. (2004) conducted a case report in Unstable Angina and No Evident Coronary Artery Stenoses (n=1). Tc-99m Tetrofosmin and Dipyridamole Infusion was evaluated on Reverse perfusion pattern. Tc-99m tetrofosmin myocardial scintigraphy after dipyridamole infusion demonstrated a rare reverse perfusion pattern with ST segment depression in a patient with unstable angina.
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