In a message dated 29/06/1998 Susan J. Herdman
<[log in to unmask]> wrote:
> You raise an interesting question re circulatory problems and
> dizziness. BPPV is only diagnosed by the presence of nystagmus
> concurrent with the brief periods of vertigo (a true spinning
> sensation). Presumably the physicians who diagnosed you actually saw
> the nystagmus; otherwise the diagnosis may have been incorrect.
> Vascular "events" involving the brainstem may also result in (central)
> positional nystagmus which can be confused with BPPV. A cardiac event
> would not result in nystagmus.
***A most relevant and helpful analysis - during the earliest stages of my
disorder, there indeed was pronounced nystagmus, though that has disappeared
completely. The vertigo, however, still occurs episodically. However, though a
cardiac event does not result in nystagmus, is it possible that subtle
cardiovascular events could also be simultaneously implicated in the onset of
dizziness, so that the true BPPV would be masking the existence of another
concurrent pathology?
Dr Mel C Siff
Littleton, Colorado, USA
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