A Breath‐Holding Index Applied to the Internal Carotid Artery Siphon in Transcranial Doppler Studies

ABSTRACT BACKGROUND AND PURPOSE The breath‐holding index (BHI) is a useful method to assess cerebrovascular reactivity. It is calculated based on the mean flow velocities of the middle cerebral artery (MCA) using transcranial Doppler (BHIMCA). Therefore, it is not feasible in patients with poor temp...

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Bibliographic Details
Published in:Journal of neuroimaging 2020-11, Vol.30 (6), p.862-866
Main Authors: Jung, Kyu‐On, Lee, Seung‐Jae, Lee, Tae‐Kyeong
Format: Article
Language:English
Subjects:
Breath‐holding index
Carotid arteries
Carotid artery
Cerebral blood flow
cerebrovascular reactivity
Correlation coefficient
Correlation coefficients
Feasibility studies
Flow velocity
internal carotid artery
Ischemia
Neuroimaging
Occlusion
Reproducibility
Stenosis
transcranial Doppler
Ultrasound
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Summary:ABSTRACT BACKGROUND AND PURPOSE The breath‐holding index (BHI) is a useful method to assess cerebrovascular reactivity. It is calculated based on the mean flow velocities of the middle cerebral artery (MCA) using transcranial Doppler (BHIMCA). Therefore, it is not feasible in patients with poor temporal windows. This study tested the feasibility of a BHI using the internal carotid artery (ICA) siphon flow velocity (BHIICA). METHODS Twenty‐four patients (aged 38‐79 years) with unilateral or bilateral stenosis of the cervical ICAs were prospectively recruited. The 48 examined bilateral ICAs were divided into three groups according to the stenosis degree: .9) and a significantly decreased BHI with increasing stenosis of the ICA (P = .001). For the BHIICA, good reproducibility was demonstrated (rI > or ≒ .9), but there was no significant decrease in the BHI related to the increasing degree of ICA stenosis (P = .952). Furthermore, the correlation between the two BHI methods was not robust (kappa coefficient, right .259; left .619). CONCLUSIONS Our study suggests that the BHIICA is not a feasible alternative method to the BHIMCA.
ISSN:1051-2284
1552-6569
DOI:10.1111/jon.12752