calculated left ventricular blood pressure maximum rate of negative change in left ventricular blood pressure 2013-07-31T15:27:12Z A calculated hemodynamic measurement related to the ability of the heart left ventricle to relax. The point at which the negative pressure fall velocity reaches its peak is taken to be the onset of isovolumic relaxation of the left ventricle. JSmith LV -dP/dt Max peak -LVdP/dt rate of maximum negative change in left ventricular blood pressure