Changes in Heart Rate Variability And Heart Rate/Activity Slope Measures After Hospitalization for Acute Exacerbations of COPD: An Observational Study
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Pulmonary Disease, Chronic Obstructive
- Sponsor
- Minneapolis Veterans Affairs Medical Center
- Enrollment
- 45
- Primary Endpoint
- Model fit from repeated measures mixed model of heart rate/activity slope
- Last Updated
- 4 years ago
Overview
Brief Summary
The purpose of this study is to observe the variation in time between heart beats and how heart rate changes during activity evolve after hospitalization for an exacerbation of COPD.
Detailed Description
The investigators will place a monitoring patch that continuously records electrocardiogram and activity. Participants will switch this patch every 7 days for a total of 28 days. From these data the investigators will observe how heart rate variability and heart rate responses to exercise evolve after hospitalization for an exacerbation of COPD.
Investigators
David MacDonald
Principal Investigator
Minneapolis Veterans Affairs Medical Center
Eligibility Criteria
Inclusion Criteria
- •Signed informed consent
- •At least moderate COPD by Global Initiative for Chronic Obstructive Lung Disease spirometry criteria (FEV1/FVC \< 0.7 and FEV1 \< 80% predicted)
- •10 pack year smoking history
- •Hospitalized with one or more of:
- •increased dyspnea
- •increased sputum
- •change in sputum character
- •Treated with corticosteroids and/or antibiotics for respiratory indications
- •Age \> 40 years old
Exclusion Criteria
- •Discharging home on hospice
- •Inability to follow trial protocols
- •Allergy to a component of the adhesive patches
- •Breastfeeding
- •Permanent/continuous atrial fibrillation
Outcomes
Primary Outcomes
Model fit from repeated measures mixed model of heart rate/activity slope
Time Frame: 28 days
The investigators will average heart rate and activity (from accelerometer output) over 30-second periods. The highest 30-second average from each 5 minute period will be used to create the heart rate/activity slope for each 24-hour period while the device is worn. They will then model the change in heart rate/activity slope using a linear-mixed effect model with a random intercept and slope for each individual.
Heart rate variability slopes (time and frequency-domain)
Time Frame: 28 days
The investigators will use Kubios software to calculate heart rate variability (time and frequency domain measurements) for each 24-hour period that the patch is worn. They will use repeated mixed measures models with random intercept and slope to model the change in heart rate variability after discharge.
Secondary Outcomes
- Comparison of heart rate/activity slope in participants readmitted vs not-readmitted(28 days)
- Acceptability to participants(28 days)
- Comparison of heart rate variability slope in participants readmitted vs not-readmitted(28 days)