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Increased fluid accumulation, reduced physical activity and heart rate variability during national holidays in patients with cardiac implantable electronic devices.

Olsson, Anneli LU orcid ; Rylance, Rebecca LU ; Borgquist, Rasmus LU orcid ; A.Mohammad, Moman LU orcid ; Erlinge, David LU orcid and Platonov, Pyotr LU (2025) In European Journal of Preventive Cardiology p.1-6
Abstract
Aims
The higher incidence of myocardial infarction (MI) during national holidays could be caused by overindulgence of food and beverages, potentially straining the heart of vulnerable individuals. Monitoring decreased thoracic impedance by cardiac implantable electronic devices (CIED) can be used for detection of fluid accumulation. We aimed to assess the relationship between cardiac metrics and national holidays in patients with CIED.

Methods and results
Patients with CIED-based impedance monitoring at a tertiary care hospital in Sweden were screened. Patients were included if they had data for at least one holiday (Christmas, New Year, or Midsummer) between June 2015 and January 2020. Thoracic impedance, heart rate... (More)
Aims
The higher incidence of myocardial infarction (MI) during national holidays could be caused by overindulgence of food and beverages, potentially straining the heart of vulnerable individuals. Monitoring decreased thoracic impedance by cardiac implantable electronic devices (CIED) can be used for detection of fluid accumulation. We aimed to assess the relationship between cardiac metrics and national holidays in patients with CIED.

Methods and results
Patients with CIED-based impedance monitoring at a tertiary care hospital in Sweden were screened. Patients were included if they had data for at least one holiday (Christmas, New Year, or Midsummer) between June 2015 and January 2020. Thoracic impedance, heart rate variability, and activity during the holiday were compared with baseline values, defined as the average of 3 days preceding Christmas and Midsummer. Clinical characteristics were obtained from medical records. In total, 96 patients (82% men, age 69 ± 10 years, 92% ICD, 78% CRT, 72% with LVEF < 40%) were included, which provided data for 649 patient-holidays. During Christmas Day, New Year’s Day, and Midsummer Day combined, 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] and daily activity by a mean of 40 min [35–45, P < 0.001]. One ventricular tachycardia event requiring shock therapy was documented during the holiday.

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. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
European Journal of Preventive Cardiology
pages
1 - 6
publisher
Oxford University Press
external identifiers
  • pmid:39910995
ISSN
2047-4881
DOI
10.1093/eurjpc/zwaf054
language
English
LU publication?
yes
id
3900d88c-2690-4f1b-a0c9-9f70304d1a24
date added to LUP
2025-02-26 09:15:08
date last changed
2025-02-27 03:14:41
@article{3900d88c-2690-4f1b-a0c9-9f70304d1a24,
  abstract     = {{Aims<br/>The higher incidence of myocardial infarction (MI) during national holidays could be caused by overindulgence of food and beverages, potentially straining the heart of vulnerable individuals. Monitoring decreased thoracic impedance by cardiac implantable electronic devices (CIED) can be used for detection of fluid accumulation. We aimed to assess the relationship between cardiac metrics and national holidays in patients with CIED.<br/><br/>Methods and results<br/>Patients with CIED-based impedance monitoring at a tertiary care hospital in Sweden were screened. Patients were included if they had data for at least one holiday (Christmas, New Year, or Midsummer) between June 2015 and January 2020. Thoracic impedance, heart rate variability, and activity during the holiday were compared with baseline values, defined as the average of 3 days preceding Christmas and Midsummer. Clinical characteristics were obtained from medical records. In total, 96 patients (82% men, age 69 ± 10 years, 92% ICD, 78% CRT, 72% with LVEF &lt; 40%) were included, which provided data for 649 patient-holidays. During Christmas Day, New Year’s Day, and Midsummer Day combined, impedance decreased by a mean of 1.1 Ohm [95% CI 0.7–1.6, P &lt; 0.001], heart rate variability decreased by a mean of 8.0 ms [4.9–11.2, P &gt; 0.001] and daily activity by a mean of 40 min [35–45, P &lt; 0.001]. One ventricular tachycardia event requiring shock therapy was documented during the holiday.<br/><br/>Conclusion<br/>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.}},
  author       = {{Olsson, Anneli and Rylance, Rebecca and Borgquist, Rasmus and A.Mohammad, Moman and Erlinge, David and Platonov, Pyotr}},
  issn         = {{2047-4881}},
  language     = {{eng}},
  pages        = {{1--6}},
  publisher    = {{Oxford University Press}},
  series       = {{European Journal of Preventive Cardiology}},
  title        = {{Increased fluid accumulation, reduced physical activity and heart rate variability during national holidays in patients with cardiac implantable electronic devices.}},
  url          = {{http://dx.doi.org/10.1093/eurjpc/zwaf054}},
  doi          = {{10.1093/eurjpc/zwaf054}},
  year         = {{2025}},
}