Abstract: A device is disclosed to determine performance of a periodically changing system, to generate a performance diagram and to measure and display performance in said. The device further measures sufficiency, efficiency, and effectiveness, sufficiency reserves, efficiency reserves, and effectiveness reserves of the system during performance of tasks by comparison with sufficiency reference frames, efficiency reference framers and effectiveness reference frames, said frames determining the operating range for further determination of deterioration and/or improvement of the system from the time changes of the reserves. The method and device have utility to determine the need for intervention, to design and monitor interventions for improvement of the system.

Abstract: A diagnostic and monitoring device is disclosed to determine functionality of the cardiocirculatory system, to generate a cardiocirculatory performance scale for display in a performance diagram, and to measure cardiocirculatory functionality on the performance scale. The diagnostic and monitoring device further identifies zones of criticalities on the performance scale used as reference to diagnose myocardial fitness, myocardial impairment, dysfunctions, critical illness, improvement and/or deterioration of cardiocirculatory status, and outcome. The method and device have utility to design and monitor therapies for differential treatment of myocardial impairment, dysfunctions, rehabilitation, and conditioning exercises, to evaluate the efficacy of drugs, and to predict outcome of interventions.