Why the study?
The study was conducted to comparatively analyze spectral indices of photoplethysmogram signals and RR-intervals among healthy volunteers, patients with COVID-19, and patients with COVID-19 and chronic arterial hypertension.
Viral infection and arterial hypertension may have different effects on the autonomic control loops of heart rate and vascular tone, as indicated by spectral analysis of PPG and RR-intervals.
Answers are grounded in this paper and cite their sources.
Differential LF/HF patterns by hypertension status warrant caution in autonomic assessment during COVID-19; leaves open optimal signal choice for future studies.
The work aims to carry out a comparative analysis of the spectral indices of the photoplethysmogram signals and RR-intervals of healthy volunteers, patients with COVID-19, as well as patients with COVID-19 and chronic arterial hypertension of 1-2 degrees. The study included 45 records of pairs of electrocardiogram and photoplethysmogram signals. Each sample included 15 pairs of 20-minute experimental signals. The study revealed an increase in the integrated power of the low-frequency (LF) band over the integrated power of the high-frequency (HF) band in the photoplethysmogram signals in patients with COVID-19, burdened with hypertension. In the signals of the RR-intervals, the largest values of the ratio of the LF to HF indices are associated with patients without cardiovascular diseases. In turn, this may be an indicator of the different effects of viral infection and arterial hypertension on the loops of autonomic control of heart rate and vascular tone.
No takes yet. Share an insight, caveat, or question.
Skazkina et al. (2021) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: