Reducing Sedentary Time in Individuals With Pacemakers - Tracking By Pacemaker-Based Accelerometry
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Medical College of Wisconsin
- Enrollment
- 21
- Locations
- 1
- Primary Endpoint
- Physical Activity Level as Measured by Embedded Accelerometer
Study Overview
Brief Summary
The benefits of regular physical activity are well-established. Furthermore, the investigators have previously shown that in a population of patients with implanted pacemakers, those who exercise more than 2 hours daily have improved survival compared with those who exercise less than 2 hours daily. In this study, the aim f the investigators is to determine whether the offering subjects with pacemakers who have low levels of physical activity at baseline counseling to increase physical activity levels is effective as measured by their implanted device as well as by an external pacemaker.
The investigators seek to enroll about 30 patients into a 6-month 1:1 randomized interventional trial comparing the levels of physical activity in 2 groups, those who receive physical activity counseling versus usual care. The activity levels will be measured with external pedometers and with accelerometers embedded within the pacemaker device.
Detailed Description
The benefits of habitual physical activity (PA, activities of at least moderate intensity defined as ≥ 3 metabolic equivalents (METs)) are well-recognized. Emerging information from large data sets strongly suggest high levels of sedentary behavior, defined as activities <1.5 METs (equivalent to the amount of energy expended during seated activities such as computer work) increases the risk of diabetes, cardiovascular disease, and death, independent of the amount and intensity PA. The increased risk of sedentary behavior appears to be mediated at least in part by reduced insulin sensitivity, impaired lipid metabolism, increased vascular inflammation, and increased thrombotic tendencies.
The internal accelerometer embedded in Medtronic pacemakers registers, stores, and reports total number of "active time" based on a threshold activity intensity level of approximately 70 steps/min (estimated to be > 1.5 METs). This implanted accelerometer, combined with the regular follow-up required for appropriate care make individuals who have undergone Medtronic pacemaker implantation an ideal population in which to evaluate the impact of altering sedentary behavior on mortality and cardiovascular events.
The hypotheses are as follows:
- a 12 week intervention to increase moderate intensity physical activity delivered at the point of care in patients with pacemakers will result in parallel increases in active time as measured by the pacemaker and step count as measured by pedometer.
- the increase in activity measured by both the metrics in hypothesis 1 will be greater than with usual care.
Potential subjects who are interested in the study will have a screening visit to determine whether they meet the inclusion and exclusion criteria. Those who qualify and agree to participate will be randomized into either the Physical Activity Counseling arm (intervention arm) or the Patient Usual Care arm (control arm).
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 55 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Age > 55 years old
- •Clinical indication for placement of permanent pacemaker
- •LVEF of ≥ 50% at the time of or within 72 hours of implantation.
- •Able to ambulate
- •Average active time of ≤ 2 hours/day based on Revo or EnRhythm Accelerometery read out for the 3 month period prior to enrollment
- •Able to take 650 steps over 10 minutes following pacemaker implantation (~2-2.5 mph walking speed)
Exclusion Criteria
- •Follow up for implantation planned at a non-study center at the time of implantation.
- •Individuals with and expected life span of 1 year or less at the time of implantation
- •Known history of cognitive impairment or inability to follow study procedures
Arms & Interventions
Physical Activity Counseling
Subjects will be given counseling on the benefits of increasing activity, instructions on how to slowly increase their activity over 12 weeks with walking, record their daily step counts, and have bi-weekly phone calls with study staff to reinforce the training and help them overcome barriers to being physically active.
Intervention: Physical activity counseling (Behavioral)
Patient Usual Care
Subjects will undergo usual care without intervention in this study arm
Intervention: Usual care (Behavioral)
Outcomes
Primary Outcomes
Physical Activity Level as Measured by Embedded Accelerometer
Time Frame: 6 months
This is the daily measured active hours in the device
Secondary Outcomes
- Physical Activity Level as Measured by External Pedometer(6 months)
Investigators
Michael E. Widlansky
Associate Professor of Medicine and Pharmacology
Medical College of Wisconsin