Spontaneous silent myocardial ischemia assessed by technetium-99m-sestamibi imaging
B Samman1, S D Hahn, D E Messinger
1Division of Cardiology, Memorial Hospital of Rhode Island, Pawtucket 02860.
Abstract:
We report on an 80-yr-old patient with a history of inferior myocardial infarction. The patient was injected with 15 mCi of 99mTc-sestamibi when an electrocardiogram revealed new asymptomatic inferolateral ST-segment depressions. A second 99mTc study was performed 72 hr after the initial injection and after ST-segment changes had resolved. Scintigraphic acquisitions using SPECT revealed a large reduction in photon activity in the inferolateral and inferoposterior walls with 70%-80% normalization. Therefore, 99mTc-sestamibi imaging is useful in assessing asymptomatic silent myocardial ischemia.
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