This clinical trial is focused on studying the safety and effects of a medication called Regadenoson in children who need a special type of heart scan. This scan, known as radionuclide myocardial perfusion imaging, helps doctors see how well blood is flowing to the heart muscle. The study involves children aged from 1 month to 18 years who may have heart conditions such as Kawasaki disease, congenital heart diseases, or have had heart surgery or a transplant.
The purpose of the study is to understand how safe and tolerable a single dose of Regadenoson is when given through an injection into a vein. The study will also look at how the medication affects heart rate in different age groups: infants, children, and adolescents. Another medication, Gadovist, which is a type of contrast used in imaging tests, may also be used during the study.
Participants will receive a single dose of Regadenoson adjusted to their body weight. The study will monitor any side effects, changes in vital signs like blood pressure and heart rate, and other health indicators. The relationship between the medication and changes in heart rate will be assessed, considering factors like age, gender, and body weight. The study aims to provide valuable information on the use of Regadenoson in young patients undergoing heart scans.



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