Influence of compression aids on baroreflex in patients after cervical spinal cord injury
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14110%2F18%3A00105522" target="_blank" >RIV/00216224:14110/18:00105522 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Influence of compression aids on baroreflex in patients after cervical spinal cord injury
Original language description
Introduction: Patients after cervical spinal cord injury (cSCI) often suffer from orthostatic hypotension (OH). Although vagal cardiac chronotropic effect is preserved in cSCI, baroreflex vascular tone regulation is impaired due to interrupted sympathetic pathways below the cSCI level. Patients usually use compression aids (CA, e.g. stockings, abdominal corset) to mitigate blood pressure (BP) drop during orthostasis. This study aimed to assess the influence of CA on baroreflex function in cSCI patients during orthostasis. Methods: BP was continuously recorded in 9 cSCI patients during passive orthostasis without and with CA. Beat-to-beat systolic blood pressure (SBP) and inter-beat intervals (IBI) sequences were obtained from continuous non-invasive BP recording. Pulse pressure (PP) was evaluated as a mean of beat-to-beat differences between SBP and diastolic pressures. Closed loop of SBP IBI interaction was mathematically opened by bivariate autoregressive model; causal coherence (a measure of IBI and SBP synchronization) and gain estimating baroreflex sensitivity (BRS) were calculated in baroreflex direction (from SBP to IBI). Results: When CA were applied, coherence and PP were significantly increased as compared to orthostasis without CA (p < 0.05). CA application was also associated with an increase of BRS (borderline significant; p = 0.059). Patients reported less OH symptoms when wearing CA. Conclusion: Use of CA increased venous return and consequently stroke volume expressed as an increase of PP in this study. This probably prevented the baroreflex sensitivity decrease during orthostasis. We suppose that positive influence of CA on blood pressure regulation during orthostasis weakened OH symptoms in cSCI.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
30201 - Cardiac and Cardiovascular systems
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Noninvasive methods in cardiology 2018
ISBN
9788021091092
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
63-70
Publisher name
Masaryk University
Place of publication
Nové Město nad Metují
Event location
Nové Město nad Metují
Event date
Jan 1, 2018
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
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