ADAMTS13 deficiency does not affect the rate of thrombus growth in the absence of VWF. Thrombus growth kinetics were calculated by dividing the diameter of the thrombus at time (n) by the diameter of the same thrombus at time (0). Thrombi that were at least 30 μm in diameter were followed for 2 minutes. The rate of thrombus growth in the VWF-deficient Adamts13^−/− mice (dashed line with diamonds) was similar to the VWF-deficient Adamts13^+/+ mice (solid line with squares). The slope for both groups of mice was 0.002. The errors bars represent the standard error of the mean.