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This study examined the prognostic value of vagal nerve activity in patients with newly diagnosed glioblastoma.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>Eighty-eight patients underwent a surgical resection or biopsy of glioblastoma in a single institution between 2003 and 2023. Inclusion criteria were: (1) age over 18; (2) diagnosed with newly diagnosed glioblastoma; (3) having an ECG prior to surgery. The predictor was vagal nerve activity indexed by heart rate variability (HRV) and obtained retroactively from 10\u00a0s ECGs. The main endpoint was overall survival (OS).<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>HRV significantly predicted OS independent of confounders such as age, performance status, or extent of tumor resection (EOR), but only among younger patients (\u2264\u200965\u00a0years old). Patients with low and high HRV had OS of 13.2 and 20.2\u00a0months, respectively (p\u2009&lt;\u20090.05). We found evidence for a moderating effect of HRV in relation to other prognostic factors. Specifically, EOR predicted death only in patients with low HRV, but not with high HRV. Similarly, KPS tended to predict death only in patients with low, but not high HRV.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions<\/jats:title>\n            <jats:p>In this study, we have shown for the first time the clinical and prognostic value of vagal nerve activity indexed by measurement of HRV in patients with newly diagnosed glioblastoma. If replicated in prospective studies, vagal nerve activity may have the potential to be a new therapeutic target in newly diagnosed glioblastoma.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1007\/s11060-025-05010-3","type":"journal-article","created":{"date-parts":[[2025,6,12]],"date-time":"2025-06-12T12:04:31Z","timestamp":1749729871000},"page":"219-225","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The prognostic and protective roles of heart-rate variability in glioblastoma: making GBM less vague"],"prefix":"10.1007","volume":"174","author":[{"given":"Yori","family":"Gidron","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niv","family":"Katan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nour","family":"Mansour","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachel","family":"Grossman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,6,12]]},"reference":[{"issue":"3","key":"5010_CR1","doi-asserted-by":"publisher","first-page":"794","DOI":"10.1245\/s10434-016-5635-z","volume":"24","author":"R Grossman","year":"2017","unstructured":"Grossman R et al (2017) Dynamics of FLAIR volume changes in glioblastoma and prediction of survival. 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