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. 2021 Jan-Mar;14(1):128-129.
doi: 10.4103/apc.APC_105_20. Epub 2020 Nov 19.

The slow-flat-slow sequence in malignant vasovagal syncope

Guy Vaksmann  1 , Ivan Bouzguenda  1 , Marie-Dominique Lamblin  2
Affiliations

The slow-flat-slow sequence in malignant vasovagal syncope

Guy Vaksmann et al. Ann Pediatr Cardiol. 2021 Jan-Mar.

Abstract

We present the electroencephalographic and electrocardiographic tracing obtained in an 8-year old boy who experienced malignant vasovagal syncope during the recording. This tracing illustrates the highly specific "slow-flat-slow" sequence described in cases of syncope induced by severe cerebral hypoperfusion.

Keywords: Asystole; convulsive syncope; electroencephalogram; malignant vasovagal syncope.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
EEG recording and EKG lead during syncope. Annotations of the technician are reproduced above the recording. EEG slowing starts in response to an asystole lasting for 10.5 s with occurrence of slow large delta waves and the EEG flattens for a similar period but with a delay. Then EEG modified in the reverse order as the cardiac rhythm normalized. Myoclonic jerks occurred during recording causing artifacts on EKG. The boy regained consciousness as the EEG activity normalized. EEG: Electroencephalogram
See this image and copyright information in PMC

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