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dc.contributorSistema FMUSP-HC: Faculdade de Medicina da Universidade de São Paulo (FMUSP) e Hospital das Clínicas da FMUSP
dc.contributor.authorINTHARAKHAM, Kannakorn
dc.contributor.authorPANERAI, Ronney B.
dc.contributor.authorKATSOGRIDAKIS, Emmanuel
dc.contributor.authorLAM, Man Y.
dc.contributor.authorLLWYD, Osian
dc.contributor.authorSALINETH, Angela S. M.
dc.contributor.authorNOGUEIRA, Ricardo C.
dc.contributor.authorHAUNTON, Victoria
dc.contributor.authorROBINSON, Thompson G.
dc.date.accessioned2019-11-06T18:51:55Z-
dc.date.available2019-11-06T18:51:55Z-
dc.date.issued2019
dc.identifier.citationPHYSIOLOGICAL MEASUREMENT, v.40, n.8, article ID 85002, 9p, 2019
dc.identifier.issn0967-3334
dc.identifier.urihttps://observatorio.fm.usp.br/handle/OPI/34151-
dc.description.abstractObjective: It is unclear whether the duration of recordings influences estimates of dynamic cerebral autoregulation (dCA). Therefore, we performed a retrospective study of the effects of reducing recording durations on dCA estimates; with the potential to inform recording duration for reliable estimates in challenging clinical populations. Approach: Seventy-eight healthy control subjects and 79 acute ischaemic stroke (AIS) patients were included. Cerebral blood flow (CBF) velocity was recorded with transcranial Doppler (TCD) and continuous blood pressure (BP) with a Finapres device. The autoregulation index (ARI), derived with transfer function analysis (TFA), was calculated for recording durations at one-minute intervals between 1 and 5 min using the same starting point of each recording. Main results: Though recording duration did not affect the overall ARI value, when compared to control subjects, AIS patients had significantly lower ARI values for durations between 3 and 5 min (p < 0.0001), but not 1 and 2 min. The intraclass correlation coefficient of all participants, for reproducibility of the five recording durations, was 0.69. AIS patients classified as having impaired cerebral autoregulation (CA; ARI <= 4) at 5 min, had a 7.1% rate of false negatives for both 4 and 3 min recordings, reaching 42.9% for 1 min recording. The percentage of false-positives also increased with reduced recording durations (from 0% at 5 to 16.2% at 1 min). Significance: Reducing recording durations from 5 to 3 min can still provide reliable estimates of ARI, and may facilitate CA studies in potentially medically unstable AIS patients, as well as in other patient groups.eng
dc.description.sponsorshipEPSRCEngineering & Physical Sciences Research Council (EPSRC) [EP/K041207/1]
dc.description.sponsorshipMinistry of Sciences and Technology of the Royal Thai Government
dc.description.sponsorshipThammasat University (Thailand)
dc.language.isoeng
dc.publisherIOP PUBLISHING LTDeng
dc.relation.ispartofPhysiological Measurement
dc.rightsrestrictedAccesseng
dc.subjectdynamic cerebral autoregulationeng
dc.subjecttransfer function analysiseng
dc.subjectcerebral blood floweng
dc.subject.otherarterial-blood-pressureeng
dc.subject.otherspontaneous fluctuationseng
dc.subject.otherflow velocityeng
dc.subject.otherindexeng
dc.subject.otherreliabilityeng
dc.subject.othermodelseng
dc.subject.otherageeng
dc.titleCan we use short recordings for assessment of dynamic cerebral autoregulation? A sensitivity analysis study in acute ischaemic stroke and healthy subjectseng
dc.typearticleeng
dc.rights.holderCopyright IOP PUBLISHING LTDeng
dc.identifier.doi10.1088/1361-6579/ab39d3
dc.identifier.pmid31394523
dc.subject.wosBiophysicseng
dc.subject.wosEngineering, Biomedicaleng
dc.subject.wosPhysiologyeng
dc.type.categoryoriginal articleeng
dc.type.versionpublishedVersioneng
hcfmusp.author.externalINTHARAKHAM, Kannakorn:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England
hcfmusp.author.externalPANERAI, Ronney B.:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England; Univ Leicester, Leicester Biomed Res Ctr, Natl Inst Hlth Res, Leicester, Leics, England
hcfmusp.author.externalKATSOGRIDAKIS, Emmanuel:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England
hcfmusp.author.externalLAM, Man Y.:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England
hcfmusp.author.externalLLWYD, Osian:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England
hcfmusp.author.externalHAUNTON, Victoria:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England; Univ Leicester, Leicester Biomed Res Ctr, Natl Inst Hlth Res, Leicester, Leics, England
hcfmusp.author.externalROBINSON, Thompson G.:Univ Leicester, Dept Cardiovasc Sci, Cerebral Haemodynam Ageing & Stroke Med CHIASM Re, Leicester, Leics, England; Univ Leicester, Leicester Biomed Res Ctr, Natl Inst Hlth Res, Leicester, Leics, England
hcfmusp.description.articlenumber85002
hcfmusp.description.issue8
hcfmusp.description.volume40
hcfmusp.origemWOS
hcfmusp.origem.idWOS:000484262000002
hcfmusp.origem.id2-s2.0-85071784883
hcfmusp.publisher.cityBRISTOLeng
hcfmusp.publisher.countryENGLANDeng
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dc.description.indexMEDLINEeng
dc.identifier.eissn1361-6579
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hcfmusp.scopus.lastupdate2022-05-05-
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