A method and apparatus for controlling a ventricular assist device are disclosed.
The method includes the step of providing a ventricular assist device which can
be defined in terms of operational parameters such as pump speed or current. Measuring
at least one physiological parameter reflecting a physiological state corresponding
to a patient. Correlating at least one physiological parameter measured from the
patient to at least one operational parameter using an estimation method. Selecting
a physiological state definable by desired values of the physiological parameters.
Monitoring at least one operational parameter. Controlling input values of the
operational parameter based on output from the monitoring step. The apparatus includes
a pump driven by a motive drive and having an impeller. A sensor detects the value
of an operational parameter of the pump. A processor provides a statistical correlation
between patients physiological parameter and the operational parameter of the pump
and adjusts the operational parameter to affect a predetermined optimal physiological state.