What question did this study set out to answer?

To assess the feasibility and diagnostic accuracy of direct exercise-induced myocardial ischemia imaging using fluorine-18-2-deoxyglucose (18FDG) combined with technetium-99m-sestamibi.

August 26, 2003Circulation

Direct Imaging of Exercise-Induced Myocardial Ischemia With Fluorine-18–Labeled Deoxyglucose and Tc-99m-Sestamibi in Coronary Artery Disease

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Why the study?

Does simultaneous exercise 18FDG and Tc-99m-sestamibi imaging improve the detection of exercise-induced myocardial ischemia compared to standard perfusion imaging in patients with suspected CAD?

Key Points

To assess the feasibility and diagnostic accuracy of direct exercise-induced myocardial ischemia imaging using fluorine-18-2-deoxyglucose (18FDG) combined with technetium-99m-sestamibi.
Enrolled 26 patients with known or suspected coronary artery disease and no history of myocardial infarction.
Administered simultaneous intravenous injections of 99mTc-sestamibi and 18FDG at peak exercise, followed by separate rest perfusion imaging and coronary angiography.
In 22 patients with ≥50% luminal stenosis, patient-level sensitivity was 91% (20/22) for 18FDG uptake versus 82% (18/22) for 99mTc-sestamibi perfusion abnormalities (P=NS).
Across 51 diseased vascular territories, 18FDG imaging achieved significantly higher sensitivity than perfusion imaging (67% [34/51] vs. 49% [25/51], P=0.008).

Structured PICO

Does simultaneous exercise 18FDG and Tc-99m-sestamibi imaging improve the detection of exercise-induced myocardial ischemia compared to standard perfusion imaging in patients with suspected CAD?

Population

26 patients with known or suspected coronary artery disease (CAD) and no prior myocardial infarction.

Intervention

Simultaneous myocardial perfusion and ischemia imaging with intravenous Tc-99m-sestamibi and fluorine-18-2-deoxyglucose (18FDG) at peak exercise.

Comparator

Exercise-rest 99mTc-sestamibi perfusion imaging and coronary angiography.

Outcome

Diagnostic sensitivity for detecting exercise-induced myocardial ischemia corresponding to ≥50% coronary artery luminal narrowing.surrogate

Direct imaging of exercise-induced myocardial ischemia with 18FDG is feasible and offers higher per-vessel sensitivity than standard Tc-99m-sestamibi perfusion imaging.

Discussion

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Implication

May support 18FDG for ischemia detection in suspected CAD; leaves open whether it alters management or outcomes versus perfusion imaging.

Cite This Study

He et al. (2003) studied this question.

synapsesocial.com/papers/6a99b8bea9576f909ee6c5ea https://doi.org/10.1161/01.cir.0000088784.25089.d9

Topics

Coronary artery disease Coronary CT angiography Women and heart disease

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Direct Imaging of Exercise-Induced Myocardial Ischemia With Fluorine-18–Labeled Deoxyglucose and Tc-99m-Sestamibi in Coronary Artery Disease

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Topics

Direct Imaging of Exercise-Induced Myocardial Ischemia With Fluorine-18–Labeled Deoxyglucose and Tc-99m-Sestamibi in Coronary Artery Disease

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Topics

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