Normal thromboelastography curve. The normal thromboelastographic curve is shown along with the resultant parameters along the bottom of the figure. R represents the time to clot initiation and is measured at the point that the 2 lines have separated 2 mm. K represents the clot propagation and is measured as the time from R until the curves are 20 mm apart. The angle represents the tangential angle of the curve with the horizontal and also represents clot propagation. MA is the maximal amplitude represented as the distance in millimeters between the 2 curves once they are parallel and represents peak clot rigidity.