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[Observations of choroid pulsation]

P Bischoff¹, H Niederberger, S Weinacht

¹Klinik für Augenkrankheiten, Kantonsspital St. Gallen.

Klinische Monatsblatter Fur Augenheilkunde

|May 1, 1996

Summary

Choroidal pulsation during indocyanine-green angiography is a common, likely physiological event observed in over half of patients. Localized, prolonged pulsation in choroidal veins may indicate abnormal low flow, warranting further investigation.

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Area of Science:

Ophthalmology
Medical Imaging
Cardiovascular Physiology

Background:

Choroidal pulsation during indocyanine-green (ICG) videoangiography using a scanning laser ophthalmoscope (SLO) was observed.
The frequency and forms of this pulsatile choroidal inflow phenomenon required further investigation.

Purpose of the Study:

To investigate the frequency and characteristics of choroidal pulsation during ICG angiography.
To differentiate between physiological and potentially pathological forms of choroidal pulsation.

Main Methods:

Retrospective analysis of 187 ICG angiographies performed with a Rodenstock SLO.
Classification of choroidal pulsation into four groups based on pattern and duration.
Examination of pulsation in the central retinal vein for correlation.

Main Results:

Choroidal pulsation was detected in 54% (94/173) of analyzed angiograms.
The diffuse and mixed forms (Groups 1-3) constituted 84% of observed pulsations, typically lasting a few seconds.
A distinct localized pulsation (Group 4) was noted in 17% (16/94) of cases with pulsation, characterized by back-and-forth dye movement in choroidal veins.

Conclusions:

Choroidal pulsatile inflow of ICG is a frequent and likely physiological phenomenon.
Localized, prolonged choroidal vein pulsation may represent abnormal low flow and warrants further diagnostic evaluation.
The diagnostic value of observing choroidal pulsation requires additional research into these dynamic vascular processes.

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