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Pulsed arterial spin labeling was used to quantify whole brain and regional cerebral blood flow at rest. High\u2010frequency heart rate variability (<jats:styled-content style=\"fixed-case\">HF<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content>) was used to measure cardiac vagal activity at rest. The primary aim was to determine whether brain regions implicated in regulating cardiac vagal reactions were also related to cardiac vagal activity at rest, and whether these associations varied by sex or race. Brain areas previously related to vagal reactivity were related to resting <jats:styled-content style=\"fixed-case\">HF<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">HRV<\/jats:styled-content>. Directionality of relationships differed between overall and regional flows. Some relationships were only observed in women and <jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>frican <jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>mericans. There appears to be communality between brain regions associated with task\u2010induced vagal reactivity and those associated with resting cardiac vagal activity.<\/jats:p>","DOI":"10.1111\/psyp.12321","type":"journal-article","created":{"date-parts":[[2014,9,1]],"date-time":"2014-09-01T08:47:18Z","timestamp":1409561238000},"page":"277-287","source":"Crossref","is-referenced-by-count":83,"title":["Resting high\u2010frequency heart rate variability is related to resting brain perfusion"],"prefix":"10.1111","volume":"52","author":[{"given":"Ben","family":"Allen","sequence":"first","affiliation":[{"name":"Department of Psychiatry and Psychology University of Pittsburgh Pittsburgh Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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