What is the main complication of Kawasaki syndrome that impacts coronary health?

Kawasaki syndrome primarily leads to the development of coronary artery aneurysms as a significant complication. This condition, which typically affects children, involves inflammation of the blood vessels throughout the body, particularly the coronary arteries. During the acute phase of Kawasaki disease, the inflammatory response can cause the walls of the coronary arteries to become weakened, leading to dilation and subsequent aneurysm formation.

The presence of aneurysms in the coronary arteries creates a long-term risk for various cardiovascular events due to altered blood flow and potential rupture. It's essential to monitor these patients closely, as the effects of these aneurysms could lead to ischemia or even myocardial infarction later in life if left unaddressed.

While the other options listed may be relevant to various cardiovascular issues, they are not primary complications associated with Kawasaki syndrome. This reinforces why understanding the primary long-term complication of this condition—coronary artery aneurysms—is crucial for effective management and follow-up care in affected patients.