[[B-wave]]s are more subtle than [[A-wave]]s and can indicate several abnormalities of intracranial [[homeostasis]] including being an indicator of failing intracranial [[compensation]]. It is important to note however that they can also be present in patients with normal ICP. B waves are rhythmic oscillations with ICP rising in a crescendo manner to levels 20–30 mmHg higher than baseline, with a subsequent sharp decline. They occur every 1–2 min. Note, Lundberg A waves and B waves refer to raises in static (mean ICP) and are not related to the pressure fluctuations during the cardiac cycle, which is the case for ICP wave amplitudes

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