The changes in the coronary artery associated with Kawasaki Disease can be graded.
Parameters:
(1) Z score for coronary artery diameter adjusted for body surface area
(2) absolute diameter in mm
(3) change in Z score during follow-up
Z score =
= ((measured diameter) - (normal diameter)) / (standard deviation)
change in Z score =
= (initial Z score) - (follow-up Z score)
Z Score |
Absolute Diameter |
Change in Z Score |
Classification |
< 2 |
NA |
< 1 |
1 (no involvement) |
< 2 |
NA |
>= 1 |
2 (dilation only) |
2 to 2.49 |
NA |
NA |
2 (dilation only) |
2.5 to 4.99 |
NA |
NA |
3 (small aneurysm) |
5 to 9.99 |
< 8 mm |
NA |
4 (medium aneurysm) |
>= 10 |
NA |
NA |
5 (large aneurysm) |
NA |
>= 8 mm |
NA |
5 (large aneurysm) |
Limitation:
• The coronary artery measurements must be accurate.
Specialty: Infectious Diseases