Abstract：
CONTEXT:The QT interval variability index (QTVI) is a noninvasive measure of beat-to-beat fluctuations of the QT interval as seen from a single electrocardiographic lead. It represents the relationship between the respective variabilities of the QT and R-R intervals. Recently, the QTVI was demonstrated to be an index of vagal cardiac autonomic modulation in resting conditions. OBJECTIVE:To determine whether QTVI varied in athletes at 48 hours, 1 week, and 2 weeks after a concussive head injury. DESIGN:Case series. SETTING:Testing facility. PATIENTS OR OTHER PARTICIPANTS:Three athletes with recent concussions and 3 uninjured athletes with similar demographic factors. MAIN OUTCOME MEASURE(S):Continuous 3-lead electrocardiograms were obtained in a seated, resting position over 2 successive weeks. Separate, unpaired t tests were performed to determine whether group-visit differences were present in the QTVI at 48 hours, 1 week, or 2 weeks. RESULTS:No demographic differences were present between groups. At 48 hours, the QTVI was greater in the concussion group than in the matched controls. At weeks 1 and 2, the QTVI in the concussion group was lower than at 48 hours and not different from that of the control group. CONCLUSIONS:Vagal cardiac autonomic modulation, as quantified by the QTVI, appeared to be negatively affected in concussed athletes within 48 hours of injury, resolved within 1 week, and remained at control group levels 2 weeks later. Serial assessments of QTVI may be of clinical utility in identifying suspected cases of acute concussion and may provide helpful information for determining when an athlete can return to play safely.
journal_name
J Athl Trainjournal_title
Journal of athletic trainingauthors
La Fountaine MF,Gossett JD,De Meersman RE,Bauman WAdoi
10.4085/1062-6050-46.3.230subject
Has Abstractpub_date
2011-05-01 00:00:00pages
230-3issue
3eissn
1062-6050issn
1938-162Xjournal_volume
46pub_type
杂志文章abstract：:OBJECTIVE: Our objectives were to describe the preoperative mood levels and psychological readiness levels of patients undergoing primary reconstruction of the anterior cruciate ligament (ACL) and to examine differences between adolescent and adult sports medicine patients relative to psychological readiness for ACL s...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
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abstract：OBJECTIVE:To determine injury types, natures, anatomical locations, recommended amount of time missed, and injury rates during weightlifting training. DESIGN AND SETTING:We collected and analyzed medical injury records of resident athletes and during numerous training camps to generate an injury profile. SUBJECTS:Eli...
journal_title：Journal of athletic training
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abstract：:In this article, I present an overview of the actions and effects of aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs). Although athletic trainers cannot prescribe or dispense prescription medications, they should be as aware of their effects as they are of other methods of injury treatment. To set the discuss...
journal_title：Journal of athletic training
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更新日期：1993-10-01 00:00:00
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journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-46.1.50
更新日期：2011-01-01 00:00:00
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journal_title：Journal of athletic training
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更新日期：2012-01-01 00:00:00
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更新日期：2020-12-01 00:00:00
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journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-82-19
更新日期：2020-07-01 00:00:00
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journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-52.10.12
更新日期：2017-11-01 00:00:00
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journal_title：Journal of athletic training
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doi：
更新日期：1992-01-01 00:00:00
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journal_title：Journal of athletic training
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doi：10.4085/1062-6050-48.4.15
更新日期：2013-11-01 00:00:00
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pub_type： 杂志文章
doi：10.4085/1062-6050-48.2.08
更新日期：2013-03-01 00:00:00
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doi：10.4085/1062-6050-51.3.06
更新日期：2016-02-01 00:00:00
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journal_title：Journal of athletic training
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更新日期：2013-07-01 00:00:00
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journal_title：Journal of athletic training
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doi：10.4085/1062-6050-51.9.02
更新日期：2016-06-02 00:00:00
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journal_title：Journal of athletic training
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doi：10.4085/1062-6050-47.3.14
更新日期：2012-05-01 00:00:00
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更新日期：2020-12-08 00:00:00
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更新日期：2014-07-01 00:00:00
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journal_title：Journal of athletic training
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更新日期：2006-10-01 00:00:00
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journal_title：Journal of athletic training
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更新日期：2017-03-01 00:00:00
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journal_title：Journal of athletic training
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更新日期：2018-03-01 00:00:00
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journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
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journal_title：Journal of athletic training
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doi：
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journal_title：Journal of athletic training
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pub_type： 杂志文章,实务指引
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更新日期：2014-03-01 00:00:00
