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Tomographic myocardial perfusion scintigraphy in children with Kawasaki disease
R P Spielmann1, C A Nienaber, G Hausdorf
1Department of Nuclear Medicine, University Hospital, Hamburg, FRG.
Insights
Dipyridamole-redistribution 201Tl emission computed tomography (ECT) safely assesses myocardial perfusion in children with Kawasaki disease. This noninvasive method helps detect coronary artery complications, offering an alternative to invasive angiography.
Area of Science:
- Pediatric Cardiology
- Nuclear Cardiology
- Cardiovascular Imaging
Background:
- Kawasaki disease can lead to serious late complications, including myocardial infarction and stenotic coronary lesions in children.
- Accurate assessment of myocardial perfusion is crucial for managing these risks.
- Noninvasive imaging modalities are sought as alternatives to invasive procedures.
Purpose of the Study:
- To evaluate the utility of dipyridamole-redistribution 201Tl emission computed tomography (ECT) for noninvasive assessment of myocardial perfusion in children with a history of Kawasaki disease.
- To determine if 201Tl ECT can serve as a safe alternative to invasive coronary angiography for follow-up evaluations.
Main Methods:
- Seven children (2.75–8.58 years old) with confirmed coronary aneurysms underwent dipyridamole-redistribution 201Tl ECT 3–20 months post-acute Kawasaki disease.
- Echocardiography was used to identify coronary aneurysms.
- Scintigraphy results were analyzed for regional myocardial thallium uptake defects.
Main Results:
- Six of seven children showed no significant regional reduction in myocardial thallium uptake and remained asymptomatic.
- One child with documented myocardial infarction exhibited persistent and transient thallium defects, correlating with coronary vessel obstruction confirmed by angiography.
- 201Tl ECT demonstrated a potential to identify perfusion abnormalities in a subset of patients.
Conclusions:
- Dipyridamole-redistribution 201Tl ECT appears to be a safe noninvasive method for assessing myocardial perfusion in children with Kawasaki disease.
- This technique may serve as a valuable alternative to invasive coronary angiography for long-term follow-up and detection of coronary artery complications.
Abstract:
Myocardial infarction and stenotic coronary lesions are serious late complications in children with Kawasaki disease. For the noninvasive assessment of myocardial perfusion, dipyridamole-redistribution 201Tl emission computed tomography (ECT) was performed in seven children (age 2 8/12-8 7/12 yr) 3-20 mo after the acute stage of the disease. In all patients, coronary aneurysms had been demonstrated by cross-sectional echocardiography. The scintigrams of six children showed no significant regional reduction of myocardial thallium uptake. These children had remained asymptomatic since the acute stage of Kawasaki disease. Persistent and transient thallium defects were present in one child with documented myocardial infarction. For this patient, obstruction of corresponding coronary vessels was confirmed by contrast angiography. It is suggested, that 201Tl ECT after dipyridamole-induced vasodilation may be used as a safe alternative to invasive coronary angiography for follow-up investigations in patients with Kawasaki disease.