Patent ID: 8282568

Claim:
A system for assisting a decision relating to intravenous administration of medicaments to, or changes in the intravascular volume of, a cardiac surgery patient, the system comprising an accelerometer to be positioned on, in or just below an outer surface part of the myocardium in the supply region of the one or more of left anterior descending artery (LAD), circumflex artery (CX) or right coronary artery (RCA) on which the cardiac surgery has been performed, for registering an acceleration signal characteristic to accelerations of said outer surface part(s) as a function of time in three different directions; and a signal processing unit comprising: a recording module configured to record the registered acceleration signal from the accelerometer; a data processing module configured to generate a parameter or a graphical representation based on the obtained acceleration signal, or based on an integrated signal representing velocity or position, the parameter or the graphical representation correlating with cardiac pumping capacity of the patient's heart, the data processing module being configured to generate a parametric curve being a function of time in at least one of: a three dimensional graph with axes corresponding to the acceleration, or integrated signals representing relative velocities or positions, in the three different directions, or a graph with a first axis corresponding to acceleration, velocity, or position, and a second axis corresponding to correlated pressure from synchronically registered blood pressure; a storage medium configured to store of one or more baselines for the parameter or graphical representation generated over a period of time including or following intravenous administration of medicaments or changes in the intravascular volume; and a comparison module configured to compare the parameter or graphical representation generated after intravenous administration of medicaments or changes in the intravascular volume with a stored baseline to graphically present a development over time of the parameter or graphical representation, this being useful for evaluating the effect of the intravenous administration of medicaments or change in the intravascular volume and whether this should be continued, halted, or reversed, wherein the parametric curve being a function of time is based on an amplitude of the accelerometer signal or an amplitude of an integrated signal representing velocity or position.