SYSTEMS, METHODS, AND APPARATUS FOR AMBULATORY CARDIAC PACING

1 - 20 . (canceled)

21 . An apparatus for cardiac pacing, comprising:

an implantable medical device;

a medical lead configured to be inserted into a vein of a patient;

a processor; and

a memory storing instructions that, when executed by the processor, cause the apparatus to:

select a pacing algorithm from a first pacing algorithm configured to provide intermittent pacing support or a second pacing algorithm configured to provide continuous pacing support, wherein the first pacing algorithm provides first pacing parameters based on a patient physiologic condition indicator and the second pacing algorithm provides second pacing parameters independent of the patient physiologic condition indicator;

execute the selected pacing algorithm to deliver pacing therapy to the patient via the medical lead;

perform a periodic capture check to determine if paced signals are effectively pacing a heart of the patient;

in response to determining that paced signals are effectively pacing a heart of the patient, determine a measure of pacing dependence by comparing pace inhibitions per unit time to a threshold; and

adjust one or more pacing parameters based on determining the measure of pacing dependence.

22 . The apparatus of claim 21 , wherein the implantable medical device comprises an electrocardiogram (ECG) sensor, and wherein the instructions cause the apparatus to select the pacing algorithm based on ECG data measured by the ECG sensor.

23 . The apparatus of claim 21 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time.

24 . The apparatus of claim 21 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time, and wherein the second pacing algorithm is further configured to measure a heart rate (HR) over time and adjust the PPR based on the measured HR.

25 . The apparatus of claim 21 , wherein the periodic capture check comprises:

pacing the heart at an elevated rate for a predetermined number of beats;

skipping one pace signal; and

determining that one or more paced signals are effectively pacing the heart of the patient by detecting an intrinsic heartbeat after the skipping the one pace signal.

26 . The apparatus of claim 21 , further comprising a holder, wherein the holder comprises a back surface shaped to conform to a skin surface of the patient adjacent to an insertion site.

27 . The apparatus of claim 21 , wherein the implantable medical device comprises an audible tone generator configured to alert the patient to predetermined conditions.

28 . A method for operating an ambulatory pacing device, the method comprising:

selecting a pacing algorithm from a first pacing algorithm configured to provide intermittent pacing support or a second pacing algorithm configured to provide continuous pacing support, wherein the first pacing algorithm provides first pacing parameters based on a patient physiologic condition indicator of a patient and the second pacing algorithm provides second pacing parameters independent of the patient physiologic condition indicator;

executing the selected pacing algorithm to deliver pacing therapy to the patient;

performing a periodic capture check to determine if paced signals are effectively pacing a heart of the patient;

in response to determining that paced signals are effectively pacing a heart of the patient, determining a measure of pacing dependence by comparing pace inhibitions per unit time to a threshold; and

adjusting one or more pacing parameters based on determining the measure of pacing dependence.

29 . The method of claim 28 , wherein the patient physiologic condition indicator is generated based on electrocardiogram (ECG) data measured by an ECG sensor, and wherein the pacing algorithm based is selected based on the ECG data measured by the ECG sensor.

30 . The method of claim 28 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time.

31 . The method of claim 28 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time, and wherein the second pacing algorithm is further configured to measure a heart rate (HR) over time and adjust the PPR based on the measured HR.

32 . The method of claim 28 , wherein the periodic capture check comprises:

pacing the heart at an elevated rate for a predetermined number of beats;

skipping one pace signal; and

determining that one or more paced signals are effectively pacing the heart of the patient by detecting an intrinsic heartbeat after the skipping the one pace signal.

33 . The method of claim 28 , wherein the second pacing parameters include reducing a paced pulse rate (PPR) over time.

34 . The method of claim 28 , wherein the second pacing parameters include reducing a paced pulse rate (PPR) over time, and wherein the second pacing algorithm further comprises measuring a heart rate (HR) over time.

35 . The method of claim 28 , wherein the second pacing algorithm comprises reducing a paced pulse rate (PPR) over time, and wherein the second pacing algorithm further comprises measuring a heart rate (HR) over time and further comprising: increasing the PPR when the HR reaches a threshold indicative of pacing dependence.

36 . The method of claim 28 , wherein the second pacing algorithm comprises reducing a paced pulse rate (PPR) over time, and wherein the second pacing algorithm further comprises measuring a heart rate (HR) over time and further comprising: decreasing the PPR when the HR reaches a threshold indicative of pacing independence.

37 . A non-transitory computer readable medium comprising one or more sequences of instructions, which, when executed by one or more processors, causes a computing system to perform operations comprising:

selecting a pacing algorithm from a first pacing algorithm configured to provide intermittent pacing support or a second pacing algorithm configured to provide continuous pacing support, wherein the first pacing algorithm provides first pacing parameters based on a patient physiologic condition indicator of a patient and the second pacing algorithm provides second pacing parameters independent of the patient physiologic condition indicator;

executing the selected pacing algorithm to deliver pacing therapy to the patient;

performing a periodic capture check to determine if paced signals are effectively pacing a heart of the patient;

in response to determining that paced signals are effectively pacing a heart of the patient, determining a measure of pacing dependence by comparing pace inhibitions per unit time to a threshold; and

adjusting one or more pacing parameters based on determining the measure of pacing dependence.

38 . The non-transitory computer readable medium of claim 37 , wherein the patient physiologic condition indicator is generated based on electrocardiogram (ECG) data measured by an ECG sensor, and wherein the pacing algorithm based is selected based on the ECG data measured by the ECG sensor.

39 . The non-transitory computer readable medium of claim 37 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time.

40 . The non-transitory computer readable medium of claim 37 , wherein the second pacing algorithm is configured to reduce a paced pulse rate (PPR) over time, and wherein the second pacing algorithm is further configured to measure a heart rate (HR) over time and adjust the PPR based on the measured HR.