What is the most important follow-up test for a girl diagnosed with Kawasaki disease?

The most important follow-up test for a girl diagnosed with Kawasaki disease is an echocardiogram to evaluate for coronary artery aneurysm. Kawasaki disease is known for its potential to cause inflammation of the coronary arteries, which can lead to serious complications such as aneurysm formation. Regular echocardiographic surveillance is crucial in these patients, particularly in the first few weeks after the initial diagnosis, to monitor for changes or development of aneurysms. This follow-up is critical as it directly impacts the management and potential treatment interventions to reduce the risk of long-term cardiovascular issues.

While other tests like a complete blood count, chest X-ray, and electrocardiogram may be important in a broader clinical assessment, they do not specifically address the primary concern associated with Kawasaki disease, which is the evaluation of coronary artery involvement.