Heart failure & cardiomyopathiesCohort study
Increased fluid accumulation, reduced physical activity and heart rate variability during national holidays in patients with cardiac implantable electronic devices
- Retrospective cohort study
- single-centre
Authors' conclusion
A transient decrease in thoracic impedance, heart rate variability, and physical activity was observed during national holidays, potentially contributing to the higher incidence of MI during holidays.
Study context
- Population
- Patients with cardiac implantable electronic devices (CIED)-based impedance monitoring at a tertiary care hospital in Sweden (82% men, age 69 ± 10 years, 92% ICD, 78% CRT, 72% LVEF < 40%), June 2015–January 2020649 patient-holidays
- Participants
- 96 patients
- Exposure
- National holidays vs baseline
Main finding
As reported in the abstract
Change during national holidays vs baseline: thoracic impedance, heart rate variability, daily activity · Christmas Day, New Year's Day and Midsummer Day combined
Thoracic impedance decreased by a mean of 1.1 Ohm (95% CI 0.7-1.6)
P < 0.001
Heart rate variability decreased by a mean of 8.0 ms [4.9-11.2]
P > 0.001
Daily activity decreased by a mean of 40 min [35-45]
P < 0.001
Observational data: associations, not effects.
Safety
- VT requiring shock therapy during the holiday
- 1 · events
Original publication
Increased fluid accumulation, reduced physical activity and heart rate variability during national holidays in patients with cardiac implantable electronic devices. Eur J Prev Cardiol. Published 6 February 2025. doi:10.1093/eurjpc/zwaf054
Summarised from the published abstract; every number is checked against it