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Title: The role of endothelium and disturbances of blood flowautoregulationin the pathogenesis of reflex syncope

Author:

Wnuk, Mateusz.

Date:

2012

Type:

Praca doktorska

Abstract:

The aim of the study was to evaluate: the role of endothelial function in thepathogenesis of vasovagal syncope (VVS) using flow-mediated dilation (FMD) andendothelium-independent dilation (EID); the significance of FMD and EID aspredictive factors of VVS during head-up tilt test (HUTT); the relationship betweenFMD and EID and the type of response to orthostatic stress according to VASIScriteria; the usefulness of ultrasonographic parameters calculated from the pulsedDoppler velocity signal obtained during the study of FMD and EID: maximumvelocity (Vmax), minimum velocity (Vmin), end-diastolic velocity (EDV), timeaveraged maximum velocity (TAMX), pulsatility index (PI) and resistance index (RI)in diagnosis of reflex syncope. The study comprised 80 subjects: gr. A: 50 pts withVVS, aged 17-39 yrs (mean 26.6±7.5), including 39 (78%) women and gr. K: 30subjects without VVS, aged 17-40 yrs (mean 29.7±5.7) including 23 (76.7%)women. Values of FMD and EID in pts with VVS were significantly greater thanthose in controls. It may point that the augmented endothelial function plays animportant role in VVS. The cut-off points for FMD ≥ 10,49% and for EID ≥ 27.64%were predicting syncope occurrence during HUTT with sensitivity respectivly: 100%and 64.6% and specificity: 87.5% both for FMD and EID. Independent predictors ofVVS occurrence during HUTT were: FMD, EDV during D2 phase of FMD and EIDassessment and DBP in supine position. It was not demonstrated any importantrelationship between the type of response to orthostatic stress according to VASIScriteria and values of FMD, EID and the differrences between PI and RI indices.

Place of publishing:

Kraków

Level of degree:

2 - studia doktoranckie

Degree grantor:

Uniwersytet Jagielloński. Collegium Medicum. Wydział Lekarski.

Promoter:

Wiesława Piwowarska

Date issued:

2012

Format:

application/pdf

Identifier:

oai:dl.cm-uj.krakow.pl:3493

Call number:

ZB-117821

ControlNumberVIRTUA:

click here to follow the link

Language:

pol

Access rights:

tylko w bibliotece

Location of original object:

Biblioteka Medyczna Uniwersytetu Jagiellońskiego- Collegium Medicum

Subject and keywords:

reflex syncope endothelium FMD EID nitric oxide

Object collections:

Last modified:

Oct 28, 2019

In our library since:

Mar 25, 2013

Number of object content hits:

1

Number of object content views in PDF format

1

All available object's versions:

http://dl.cm-uj.krakow.pl:8080/publication/3493

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Edition name Date
ZB-117821 Oct 28, 2019

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