A ventricle is of the heart is responsible for collecting and expelling the blood received from an atrium to the other parts of body and lungs. The right ventricle is responsible for pumping the blood to the lungs. The below section of this page shows you the Right Ventricular Contractility formula which provides you the dP/dt. This formula needs Isovolumic contraction value in m/s as the input for calculating the contractility of the right ventricle.