{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,13]],"date-time":"2025-09-13T16:38:16Z","timestamp":1757781496530,"version":"3.41.2"},"reference-count":41,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,11,12]],"date-time":"2024-11-12T00:00:00Z","timestamp":1731369600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clin Physio Funct Imaging"],"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Antihypertensives (AHD) can influence cerebral autoregulation (CA) and attenuate hypertrophic concentric remodelling of arterioles. The aim of this study was to examine the associations between AHD, CA and structural and functional properties of cerebral arteries.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this observational, cross\u2010sectional study 115 volunteers were divided in group 1 (non\u2010hypertensive) [<jats:italic>n<\/jats:italic>\u2009=\u200930]; group 2 (hypertensive with systolic blood pressure [SBP]\u2009&lt;\u2009140 and diastolic blood pressure [DBP]\u2009&lt;\u200990\u2009mmHg) [<jats:italic>n\u2009<\/jats:italic>=\u200954]; group 3 (hypertensive with SBP\u2009\u2265\u2009140 or DBP\u2009\u2265\u200990\u2009mmHg) [<jats:italic>n<\/jats:italic>\u2009=\u200931] and simultaneous measurements of systemic blood pressure (BP) and middle cerebral artery blood flow velocity (CBFV) were obtained from digital plethysmography and transcranial Doppler. Beat\u2010to\u2010beat, critical closing pressure (CrCP), resistance\u2010area product (RAP) and autoregulation index (ARI) values were extracted by linear regression analysis of instantaneous BP and CBFV waveforms using computerised analysis. Pulsatility index (PI) was calculated and CO<jats:sub>2<\/jats:sub> reactivity was assessed by the breath\u2010holding test.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Despite their higher RAP (1.7 [\u00b10.7], <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) compared to groups 1 and 2, uncontrolled hypertensive using diuretics (<jats:italic>p<\/jats:italic>\u2009=\u20090.047) and \u03b12\u2010agonists (<jats:italic>p<\/jats:italic>\u2009=\u20090.009) had significantly lower PI. Impaired CO<jats:sub>2<\/jats:sub> reactivity was common between the two hypertensive groups (<jats:italic>p<\/jats:italic>\u2009=\u20090.008), however ARI, CrCP and CBFV did not differ between them and non\u2010hypertensive individuals and also did not correlate with any AHD used.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Unlike the RAP, PI does not seem to reflect the real cerebrovascular resistence resulting from chronic arterial remodelling. Despite impaired CO<jats:sub>2<\/jats:sub> reactivity, hypertensive\u00a0have\u00a0arterial tonus and CA comparable to non\u2010hypertensive. Experimental studies involving an untreated hypertensive control group are required to robustly make definitive conclusions about these questions.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cpf.12913","type":"journal-article","created":{"date-parts":[[2024,11,13]],"date-time":"2024-11-13T12:05:49Z","timestamp":1731499549000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Correlation between antihypertensive drugs and cerebral hemodynamic parameters: insights from observational findings using transcranial Doppler"],"prefix":"10.1111","volume":"45","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2326-5231","authenticated-orcid":false,"given":"Michel Ferreira","family":"Machado","sequence":"first","affiliation":[{"name":"Department of Neurology, Hospital das Cl\u00ednicas University of S\u00e3o Paulo Medical School  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henrique Cotchi 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