Spectral Characteristics of B-Waves and Other Low-Frequency Activity

Daley, M.L.; Pasley, R.L.; Connolly, Mark; Timmons, S. D.; Angel, Jessie; Stidham, Gregory L.; Leffler, Charles W.

doi:10.1007/978-3-7091-6738-0_38

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2019

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“…Em humanos, elas aparecem no intervalo de 3-9 cpm. As ondas B92 , por sua vez, apresentam modulações lentas abaixo de 3 cpm e sua amplitude varia em função dos diferentes estados de repouso. Não há consenso sobre a origem das ondas M e B.Figura 12.…”

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Nova metodologia de Doppler transcraniano funcional durante tarefa motora unimanual

Haratz¹

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Nova metodologia de Doppler transcraniano funcional durante tarefa motora unimanual

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B waves: a systematic review of terminology, characteristics, and analysis methods

Martinez-Tejada

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Wilhjelm

et al. 2019

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Background Although B waves were introduced as a concept in the analysis of intracranial pressure (ICP) recordings nearly 60 years ago, there is still a lack consensus on precise definitions, terminology, amplitude, frequency or origin. Several competing terms exist, addressing either their probable physiological origin or their physical characteristics. To better understand B wave characteristics and ease their detection, a literature review was carried out. Methods A systematic review protocol including search strategy and eligibility criteria was prepared in advance. A literature search was carried out using PubMed/MEDLINE, with the following search terms: B waves + review filter, slow waves + review filter, ICP B waves, slow ICP waves, slow vasogenic waves, Lundberg B waves, MOCAIP. Results In total, 19 different terms were found, B waves being the most common. These terminologies appear to be interchangeable and seem to be used indiscriminately, with some papers using more than five different terms. Definitions and etiologies are still unclear, which makes systematic and standardized detection difficult. Conclusions Two future lines of action are available for automating macro-pattern identification in ICP signals: achieving strict agreement on morphological characteristics of “traditional” B waveforms, or starting a new with a fresh computerized approach for recognition of new clinically relevant patterns.

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Spectral Characteristics of B-Waves and Other Low-Frequency Activity

Cited by 2 publications

References 2 publications

Nova metodologia de Doppler transcraniano funcional durante tarefa motora unimanual

Nova metodologia de Doppler transcraniano funcional durante tarefa motora unimanual

B waves: a systematic review of terminology, characteristics, and analysis methods

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