HVAD CIRCADIAN TRACKER (PHI+)

1 . A method of detecting a disruption of a diurnal rhythm of a patient having an implantable blood pump, comprising:

calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump;

recording the calculated MACD in a log file; and

correlating when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm.

2 . The method of claim 1 , wherein the MACD zero line crossing time threshold is 24 hours.

3 . The method of claim 1 , wherein calculating the MACD includes calculating a slow moving average (SMA), and wherein the SMA is a one second average measurement of the power consumed by the implantable blood measured at a predetermined interval for a first predetermined period of time.

4 . The method of claim 3 , wherein the predetermined interval is 15 minutes.

5 . The method of claim 4 , wherein the first predetermined period of time is 48 hours.

6 . The method of claim 3 , wherein calculating the MACD includes calculating a fast moving average (FMA), and wherein the FMA is a one second average measurement of the power consumed by the implantable blood measured at the predetermined interval for a second predetermined period of time less the first period of time.

7 . The method of claim 6 , wherein the second predetermined period of time is four hours.

8 . The method of claim 1 , wherein the method further includes correlating the disruption of the patient's diurnal rhythm to at least one from the group consisting of thrombus and tachycardia.

9 . A system of detecting a disruption in a diurnal rhythm of a patient having an implantable blood pump, comprising:

a controller having a processor, the controller being in communication with the implantable blood pump and a power source configured to provide power to the implantable blood pump, the controller being configured to:

calculate a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump; and

correlate when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm.

10 . The system of claim 9 , wherein the MACD zero line crossing time threshold is 24 hours.

11 . The system of claim 9 , wherein calculating the MACD includes calculating a slow moving average (SMA), and wherein the SMA is a one second average measurement of the power consumed by the implantable blood measured at a predetermined interval for a first predetermined period of time.

12 . The system of claim 11 , wherein the predetermined interval is 15 minutes.

13 . The system of claim 12 , wherein the first predetermined period of time is 48 hours.

14 . The system of claim 11 , wherein calculating the MACD includes calculating a fast moving average (FMA), and wherein the FMA is a one second average measurement of the power consumed by the implantable blood measured at the predetermined interval for a second predetermined period of time less the first period of time.

15 . The system of claim 14 , wherein the second predetermined period of time is four hours.

16 . A method of detecting a disruption of a diurnal rhythm of a patient having an implantable blood pump and a diurnal cycle, comprising:

calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump; and

displaying the calculated MACD in a log file;

correlating when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold to a disruption of the patient's diurnal rhythm; and

correlating the disruption of the patient's diurnal rhythm to at least one from the group consisting of thrombus and tachycardia.