Pyrrhus
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Another study from van Campen, Rowe, and Visser!
Compression Stockings Improve Cardiac Output and Cerebral Blood Flow during Tilt Testing in ME/CFS (van Campen et al., 2021)
https://doi.org/10.3390/medicina58010051
Main points:
Compression Stockings Improve Cardiac Output and Cerebral Blood Flow during Tilt Testing in ME/CFS (van Campen et al., 2021)
https://doi.org/10.3390/medicina58010051
Main points:
- Without compression stockings, patients experienced a 25% drop in blood flow to the brain during tilt-table testing.
- With compression stockings on, patients experienced only a 14% drop in blood flow to the brain during tilt-table testing.
Background and Objectives:
Orthostatic intolerance (OI) is a clinical condition in which symptoms worsen upon assuming and maintaining upright posture and are ameliorated by recumbency. OI has a high prevalence in patients with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Limited data are available to guide the treatment of OI in ME/CFS patients. We and others have previously described patient-reported subjective improvement in symptoms using compression stockings. We hypothesized that these subjective reports would be accompanied by objective hemodynamic improvements.
Materials and Methods:
We performed a randomized crossover trial in 16 ME/CFS patients. Each underwent two 15-min head-up tilt table tests, one with and one without wearing knee-high compression stockings that provided 20–25 mm Hg compression. The order of the tests was randomized. We measured heart rate and blood pressure as well as cardiac output and cerebral blood flow (CBF) using extracranial Doppler of the internal carotid and vertebral arteries.
Results:
There were no differences in supine measurements between the 2 baseline measurements. There were no differences in heart rate and blood pressure at either end-tilt testing period. Compared to the test with the stockings off, the mean percentage reduction in cardiac output during the test with compression stockings on was lower, 15 (4)% versus 27 (6)% (p < 0.0001), as was the mean percentage CBF reduction, 14 (4)% versus 25 (5)% (p < 0.0001).
Conclusion:
In ME/CFS patients with orthostatic intolerance symptoms, cardiac output and CBF are significantly reduced during a tilt test. These abnormalities were present without demonstrable heart rate and blood pressure changes and were ameliorated by the use of compression stockings.