YNICL Journal 2024 Journal Article
Brain connectivity networks underlying resting heart rate variability in acute ischemic stroke
- Violeta Dimova
- Claudia Welte-Jzyk
- Andrea Kronfeld
- Oliver Korczynski
- Bernhard Baier
- Nabin Koirala
- Livia Steenken
- Bianca Kollmann
Acute strokes can affect heart rate variability (HRV), the mechanisms how are not well understood. We included 42 acute stroke patients (2-7 days after ischemic stroke, mean age 66 years, 16 women). For analysis of HRV, 20 matched controls (mean age 60.7, 10 women) were recruited. HRV was assessed at rest, in a supine position and individual breathing rhythmus for 5 min. The coefficient of variation (VC), the root mean square of successive differences (RMSSD), the powers of low (LF, 0.04-0.14 Hz) and high (HF, 0.15-0.50 Hz) frequency bands were extracted. HRV parameters were z-transformed related to age- and sex-matched normal subjects. Z-values -1). No different connectivity could be found for the respective VC groups. Our results suggest that HRV alteration after acute stroke might be due to affecting resting-state brain networks.