Corrigendum to “Cerebrovascular reactivity after treatment of unruptured intracranial aneurysms - A transcranial Doppler sonography and acetazolamide study” [Journal of the Neurological Sciences 363 (2016) 97–103

Abstract

The authors regret that there were three errors in the published version of this paper. These errors and their corrections are detailed below:1)The interquartile range (IQR) for the median time between aneurysm treatment and cerebrovascular reactivity (CVR) testing was incorrectly reported as 28.4 h. The correct value is 43.7 h. (Page 99, Chapter 3.2.)2)A typing error for a single patient caused minor inaccuracies in reported velocities. Data were corrected before statistical analysis was performed, but unfortunately Table 3 contained five uncorrected velocity values. Published velocities (cm/s):Tabled 1MFVBASELINEMFVAZ∆MFVRight60.2 (12.8)97.1 (19.7)36.9 (11.3)Left57.2 (15.0)89.6 (21.6)32.4 (8.9) Open table in a new tab Corrected velocities (cm/s):Tabled 1MFVBASELINEMFVAZ∆MFVRight59.7 (13.2)96.2 (19.9)36.5 (11.1)Left57.2 (15.0)90.1 (21.3)32.9 (8.9) Open table in a new tab The revised version of Table 3 is presented below. (Page 99, Table 3.) Table 3 Blood flow velocities and cerebrovascular reactivity.Tabled 1MFVBASELINE (cm/s)MFVAZ (cm/s)∆MFV (cm/s)CVR (%)MV (n)Right59.7 (13.2)96.2 (19.9)36.5 (11.1)62.8 (18.6)2Left57.2 (15.0)90.1 (21.3)32.9 (8.9)59.7 (17.5)9Ipsilateral59.6 (13.6)93.6 (17.7)34.0 (9.1)59.4 (19.1)9Contralateral57.8 (14.4)93.4 (22.9)35.6 (11.1)63.0 (17.2)2Mean58.5 (12.8)94.3 (19.5)35.7 (10.1)62.6 (16.8)Mean flow velocities and CVR are reported as mean (SD).SD: standard deviation.MFVBASELINE: Baseline mean blood flow velocity (before acetazolamide).MFVAZ: Maximal mean blood flow velocity after acetazolamide.∆MFV: Absolute change in mean flow velocity after acetazolamide.CVR: Cerebrovascular reactivity (relative change in mean flow velocity after acetazolamide).MV: Missing value. Open table in a new tab 3)Table 6 incorrectly states that the report of Mancini and colleagues was published in 1996. The correct year of publication is 1993. (Mancini M, De Chiara S, Postiglione A, Ferrara LA. Transcranial doppler evaluation of cerebrovascular reactivity to acetazolamide in normal subjects. Artery. 1993;20:231–241) (Page 102, Table 6.) Mean flow velocities and CVR are reported as mean (SD). SD: standard deviation. MFVBASELINE: Baseline mean blood flow velocity (before acetazolamide). MFVAZ: Maximal mean blood flow velocity after acetazolamide. ∆MFV: Absolute change in mean flow velocity after acetazolamide. CVR: Cerebrovascular reactivity (relative change in mean flow velocity after acetazolamide). MV: Missing value. The authors would like to apologise for any inconvenience the above errors may have caused. Cerebrovascular reactivity after treatment of unruptured intracranial aneurysms — A transcranial Doppler sonography and acetazolamide studyJournal of the Neurological SciencesVol. 363PreviewCerebrovascular reactivity (CVR) is defined as the change in cerebral blood flow, or blood velocity, in response to a vasoactive stimulus. There is a possible association between impaired CVR and vasospasm after aneurysmal subarachnoid hemorrhage. Most studies on CVR and vasospasm have used healthy subjects as reference. However, due to potential different vascular features, CVR in persons with intracranial aneurysms may differ from CVR in healthy subjects. Therefore, our aim was to examine CVR in patients with unruptured intracranial aneurysms (UIA). Full-Text PDF