Left Ventricular Contractility (dPmx)
From the arterial pressure curve, the pressure changes during the systolic phase can be analysed and a measure of the pressure increase over time (analysed in speed) is calculated. The steeper the upslope of the curve, the higher the contractility of the left ventricle.
As the upslope also depends on the individual compliance of the aorta, the parameter should primarily be viewed and evaluated as part of the overall trend.
Marino, Paul L. The ICU Book. 5. Auflage, dt. Ausgabe: page 859