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Comparison of 201Tl SPET and treadmill exercise testing in patients with Kawasaki disease
1Department of Pediatrics, Taichung Veterans General Hospital, Taiwan, Republic of China.
Insights
Early detection of heart issues in Kawasaki disease is crucial. Thallium-201 single photon emission tomography (SPET) shows higher sensitivity than treadmill exercise for detecting coronary artery abnormalities, aiding in diagnosis.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Diagnostic Imaging
Background:
- Kawasaki disease poses a risk for developing ischemic heart disease in children.
- Early detection and monitoring of myocardial ischemia are essential for managing long-term cardiac health.
Purpose of the Study:
- To compare the sensitivity and specificity of 201Tl SPET and treadmill exercise tests.
- To evaluate the non-invasive detection of myocardial ischemia in pediatric patients with Kawasaki disease.
Main Methods:
- A study involving 23 children (19 boys, 4 girls) with Kawasaki disease.
- Patients were divided into two groups based on coronary angiography results: with and without coronary abnormalities.
- Comparison of diagnostic performance metrics (sensitivity, specificity, false-positive/negative rates) between 201Tl SPET and treadmill exercise.
Main Results:
- 201Tl SPET demonstrated higher sensitivity (72.7%) compared to treadmill exercise (45.5%) for detecting coronary arterial lesions.
- Treadmill exercise exhibited superior specificity (100%) versus 201Tl SPET (58.3%).
- Good concordance was observed between coronary angiography findings and perfusion defects identified by 201Tl SPET.
Conclusions:
- 201Tl SPET is more sensitive for detecting coronary artery abnormalities in Kawasaki disease patients than treadmill exercise.
- Treadmill exercise offers better specificity in identifying these abnormalities.
- Positive findings from either 201Tl SPET or treadmill exercise warrant coronary angiography to rule out stenotic lesions.
Abstract:
About 4% of children with Kawasaki disease ultimately develop ischaemic heart disease. Therefore, the early detection, non-invasive monitoring and long-term follow-up of myocardial ischaemia are essential. We compared the sensitivity and specificity of 201Tl single photon emission tomography (SPET) and treadmill exercise in the detection of myocardial ischaemia in 23 patients (19 boys, 4 girls) with Kawasaki disease. They were divided into two groups according to the results of coronary angiography. Group I consisted of 11 patients with coronary abnormalities; Group II consisted of 12 patients with no coronary abnormalities. The sensitivity, specificity, false-positive and false-negative rates for detecting coronary arterial lesions were 72.7% (8/11), 58.3% (7/12), 38.5% (5/13) and 30% (3/10) for 201Tl SPET, and 45.5% (5/11), 100% (12/12), 0% (0/5) and 33.3% (6/18) for treadmill exercise, respectively. We conclude that 201Tl SPET is more sensitive than treadmill exercise for the detection of coronary arterial abnormalities, but that the specificity of treadmill exercise is better than that of 201Tl scintigraphy. Coronary artery lesions detected by coronary angiography have good concordance of ischaemic areas with perfusion defects detected by 201Tl SPET. When ischaemic findings on 201Tl SPET and/or positive treadmill exercise testing are noted, coronary angiography is strongly indicated to detect possible stenotic lesions in the coronary arteries.