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Attenuated Cardiovascular Responses to the Cold Pressor Test in Concussed Collegiate Athletes.

Abstract：

CONTEXT:Cardiovascular responses to the cold pressor test (CPT) provide information regarding sympathetic function. OBJECTIVE:To determine if recently concussed collegiate athletes had blunted cardiovascular responses during the CPT. DESIGN:Cross-sectional study. SETTING:Laboratory. PATIENTS OR OTHER PARTICIPANTS:A total of 10 symptomatic concussed collegiate athletes (5 men, 5 women; age = 20 ± 2 years) who were within 7 days of diagnosis and 10 healthy control individuals (5 men, 5 women; age = 24 ± 4 years). INTERVENTION(S):The participants' right hands were submerged in agitated ice water for 120 seconds (CPT). MAIN OUTCOME MEASURE(S):Heart rate and blood pressure were continuously measured and averaged at baseline and every 30 seconds during the CPT. RESULTS:Baseline heart rate and mean arterial pressure were not different between groups. Heart rate increased throughout 90 seconds of the CPT (peak increase at 60 seconds = 16 ± 13 beats/min; P < .001) in healthy control participants but remained unchanged in concussed athletes (peak increase at 60 seconds = 7 ± 10 beats/min; P = .08). We observed no differences between groups for the heart rate response (P > .28). Mean arterial pressure was elevated throughout the CPT starting at 30 seconds (5 ± 7 mm Hg; P = .048) in healthy control individuals (peak increase at 120 seconds = 26 ± 9 mm Hg; P < .001). Mean arterial pressure increased in concussed athletes at 90 seconds (8 ± 8 mm Hg; P = .003) and 120 seconds (12 ± 8 mm Hg; P < .001). Healthy control participants had a greater increase in mean arterial pressure starting at 60 seconds (P < .001) and throughout the CPT than concussed athletes (peak difference at 90 seconds = 25 ± 10 mm Hg and 8 ± 8 mm Hg, respectively; P < .001). CONCLUSIONS:Recently concussed athletes had blunted cardiovascular responses to the CPT, which indicated sympathetic dysfunction.

journal_name

J Athl Train

journal_title

Journal of athletic training

authors

Johnson BD,Sackett JR,Schlader ZJ,Leddy JJ

doi

10.4085/1062-6050-573-18

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

124-131

issue

eissn

1062-6050

issn

1938-162X

journal_volume

pub_type

杂志文章

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Attenuated Cardiovascular Responses to the Cold Pressor Test in Concussed Collegiate Athletes.