Patients who have had a cardiac transplant are at increased risk for coronary artery disease. Intravascular ultrasonography can grade the severity of the vascular disease, which can be monitored over time.
Parameters:
(1) intimal thickness in mm
(2) circumferential involvement in degrees
Intimal Thickness in mm
Circumferential Involvement in degrees
Class
Disease Severity
< 0.3 mm
< 180°
I
minimal
< 0.3 mm
>= 180°
II
mild
0.3 - 0.5
NA
III
moderate
0.51 - 1.00 mm
< 180°
III
moderate
0.51 - 1.00 mm
>= 180°
IV
severe
> 1.0 mm
NA
IV
severe
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