Respiratory and Cardiovascular Oscillations During B-Waves

Hashimoto, Masaaki; Higashi, Sotaro; Kogure, Y.; Fujii, Hiroyuki; Tokuda, K.; Ito, Hideki; Yamamoto, Shinjiro

doi:10.1007/978-3-642-73987-3_59

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…In accordance with our finding, that the mean wavelength of B-waves (62.4s) and their TCD equivalents (65.5 s) is longer during REM, (17,31). Pollmacher et al had found a longer interval in between PLM (53.2 s) during REM (15). Whether the rhythm with a longer wavelength during REM sleep is of different origin than the rhythm of about 40s in the waking state and non REM sleep remains open.…”

Section: Plm and B-wavessupporting

confidence: 92%

“…In the ten normal subjects the mean non-REM TCD B-wave equivalent wavelength was 42.2 s f 13.3 (n=99) (17). During REM sleep in the patients with NPH, the mean B-wave wavelength was 62.4 s f 18.7 (n=9) (15). In the 10 normal subjects the mean TCD B-wave equivalent wavelength was 65.5 sf20.8 (n=20) (17).…”

Section: B-waves and Tcd B-wave Equivalentsmentioning

confidence: 94%

“…In the 13 NPH patients the mean non REM B-wave wavelength was 43.3 s f 14.9 (n = 77) (15). In the ten normal subjects the mean non-REM TCD B-wave equivalent wavelength was 42.2 s f 13.3 (n=99) (17).…”

Section: B-waves and Tcd B-wave Equivalentsmentioning

confidence: 95%

“…In a previous communication we had already suggested to lower this limit as their are runs with varying wavelengths also in the range of approximately 10-30 s (17). Many authors approached these rhythms from their specialities and postulated associations between various parameters (15,20,22,23,25,30,32,34). Initially, rhythmic breathing with subsequent changes in pCO,, vessel diameter, blood pressure and heart rate was claimed to be the origin of these waves (16).…”

Section: Plm and B-wavesmentioning

confidence: 99%

“…There are various rhythmic events with a wavelength of 4-90 s in humans. Rhythmic oscillations of heart rate, blood pressure (15), respiration (periodic and Cheyne-Stokes breathing), intracranial pressure (B-waves) (16), and cerebral blood flow velocity (17-21) have been described. A similar rhythm has also been found in EEG recordings (22)(23)(24).…”

mentioning

confidence: 99%

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Periodic leg movements are part of the B-wave rhythm and the cyclic alternating pattern

Droste¹,

Krauss²,

Hagedorn³

et al. 1996

Acta Neurologica Scandinavica

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Periodic leg movements (PLM) in sleep are supposed to constitute a frequent cause of insomnia. There is some controversy whether PLM are the cause of insomnia by provoking microarousals or whether they are simply and epiphenomenon not casually related to the insomnia. We examined four patients with PLM by overnight polysomnography and concomitant transcranial Doppler sonography (TCD) monitoring, 13 patients with suspected normal pressure hydrocephalus by concomitant overnight polysomnography and intracranial pressure recording, and 10 healthy volunteers by concomitant overnight polysomnography and TCD monitoring. EEG arousals occurred more frequently before than after the PLM. PLM were associated with increase in heart rate, breathing amplitude, and cerebral blood flow velocity assessed by TCD. PLM occurred with a mean wavelength of 40.5 s. This mean wavelength corresponded to similar values calculated for intracranial pressure B-waves (43.3 s) in 13 patients with suspected normal-pressure hydrocephalus, TCD B-wave equivalents (42.2 s) in 10 healthy young adults and the frequency of the cyclic alternating pattern in EEg recordings (40 s). Our date suggest that these cyclic variations with a wavelength of about 40 s are part of a common endogenous rhythm. PLM seem to be an epiphenomenon of this rhythm and not the cause of insomnia.

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Section: Plm and B-wavessupporting

confidence: 92%