The Role of von Willebrand Factor and ADAMTS13 in the No-Reflow Phenomenon.

We prospectively studied the correlations between plasma levels of von Willebrand factor and its cleaving protease- disintegrin and metalloproteinase with thrombo spondin type I motif, member 13 (ADAMTS13)-in 126 patients who did or did not develop no-reflow phenomenon after primary percutaneous intervention for acute ST-segment-elevation myocardial infarction. Quantitative plasma levels of von Willebrand factor and ADAMTS13 were measured by immunoturbidometric assay. Angiographic no-reflow was observed in 46 (37%) of the 126 patients. At admission, plasma levels of von Willebrand factor were significantly higher in the no-reflow group (P <0.001), but levels of ADAMTS13 at admission were similar in the 2 groups (P=0.143). At logistic regression, after adjustment for serum creatinine, left ventricular ejection frac- tion, high-sensitivity C-reactive protein, and N-terminal pro B-type natriuretic peptide, plas- ma von Willebrand factor level at admission (=5,531 mU/mL) was still the predictive factor for the no-reflow phenomenon. The area under the receiver operating characteristics curve was 0.785. Our results suggest that high von Willebrand factor level is related to the no-reflow phenomenon in such a way that it might be a predictor of the phenomenon. [ABSTRACT FROM AUTHOR]