Thrombotic Thrombocytopenic Purpura (TTP) Survivors Exhibit Impaired Stress Perfusion on Cardiac MRI.

Stress images are on the left and rest images are on the right. The top row is a TTP subject and the bottom row is a control subject. The color maps show myocardial blood flow (MBF) in ml/g/min with brighter colors indicating higher perfusion. Stress imaging of the TTP patient shows decreased MBF compared with control, primarily noted in the subendocardium. The rest images do not show any significant difference in MBF at rest.