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Myocardial scintigraphy with 99mTc-sestamibi in children with Kawasaki disease
O Schillaci1, M Banci, F Scopinaro
1Department of Experimental Medicine, University la Sapienza, Rome, Italy.
Insights
This study shows that rest/dipyridamole 99mTc-Sestamibi scintigraphy accurately detects cardiac damage in children with Kawasaki disease (KD). This noninvasive method is valuable for monitoring coronary artery disease in young patients.
Area of Science:
- Pediatric Cardiology
- Diagnostic Imaging
- Rheumatology
Background:
- Kawasaki disease (KD) is a childhood vasculitis affecting coronary arteries, potentially causing aneurysms and long-term coronary artery disease (CAD).
- Echocardiography detects aneurysms, but invasive coronary angiography is often needed for obstructive lesions, posing challenges for repeated assessments in children.
- Current noninvasive methods like thallium 201 scintigraphy have limitations, especially in young children.
Purpose of the Study:
- To evaluate the diagnostic accuracy of noninvasive rest and dipyridamole 99mTc-Sestamibi scintigraphy for assessing myocardial perfusion in children with Kawasaki disease.
- To determine the effectiveness of 99mTc-Sestamibi imaging in detecting and monitoring cardiac involvement in young KD patients.
Main Methods:
- Utilized rest and dipyridamole 99mTc-Sestamibi scintigraphy in 15 children (aged 1-6 years) with known or suspected cardiac involvement from Kawasaki disease.
- Echocardiography confirmed coronary aneurysms in 12 patients; 8 underwent cardiac catheterization for comparison.
- Analyzed the sensitivity and specificity of 99mTc-Sestamibi imaging for detecting coronary lesions.
Main Results:
- 99mTc-Sestamibi scintigraphy demonstrated high diagnostic performance with 88% sensitivity and 93% specificity for detecting overall coronary lesions in KD patients.
- The imaging technique proved effective even in very young children (as young as one year old).
Conclusions:
- Rest/dipyridamole 99mTc-Sestamibi scintigraphy is a precise and noninvasive tool for diagnosing and following cardiac damage in children with Kawasaki disease.
- This method offers a valuable alternative to invasive procedures for long-term management of KD-related coronary artery abnormalities.
Abstract:
Kawasaki disease (KD) is a systemic vasculitis syndrome of early childhood. It involves particularly the coronary arteries and may cause aneurysms and thrombotic occlusions. Echocardiography is the most useful method of detecting coronary aneurysms. Nevertheless, obstructive lesions are difficult to evaluate and often need invasive coronary angiography. An important feature of this disease is the possibility of finding coronary pathology several years after the onset. This characteristic makes KD an important cause of coronary artery disease (CAD) in young adults. Thus patients with KD and previously diseased coronary arteries should be kept under long-term control. However, coronary angiography is invasive and cannot be performed repeatedly, especially in young patients. As an alternative, thallium 201 scintigraphy has been employed, but its low-energy photons are suboptimal for standard gamma-camera imaging, particularly in children aged less than three years. To verify the usefulness of a noninvasive assessment of myocardial perfusion, the authors used rest and dipyridamole 99mTc-Sestamibi scan in 15 children (ranging from one to six years of age) with Kawasaki's cardiac involvement. Coronary aneurysms have been demonstrated by echocardiography in 12 patients; 8 patients were also submitted to cardiac catheterization. The sensitivity of 99mTc-Sestamibi imaging for detection of overall coronary lesions was 88% and the specificity was 93%. These data suggest that rest/dipyridamole 99mTc-Sestamibi scintigraphy is an accurate and noninvasive method for the detection and follow-up of Kawasaki's cardiac damage even in patients aged one year.