Modelling of subarachnoid space width changes in apnoea resulting as a function of blood flow parameters

During apnoea, the pial artery is subjected to two opposite physiological processes: vasoconstriction due to elevated blood pressure and vasorelaxation driven by rising pH in the brain parenchyma. We hypothesized that the pial artery response to apnoea may vary, depending on which process dominate....

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Veröffentlicht in:	Microvascular research 2017-09, Vol.113, p.16-21
Hauptverfasser:	Kalicka, Renata, Mazur, Kamila, Wolf, Jacek, Frydrychowski, Andrzej F., Narkiewicz, Krzysztof, Winklewski, Pawel J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Adaptation, Physiological Apnea - physiopathology Apnoea Arterial Pressure Blood Flow Velocity Brain haemodynamics Breath Holding Cerebral Arteries - physiopathology Cerebrovascular Circulation Female Heart Rate Hemodynamics Humans Male Models, Cardiovascular NIR-T/BSS Pia Mater - blood supply Pial artery Pulsatile Flow Regional Blood Flow Subarachnoid Space - blood supply Subarachnoid space width Vasoconstriction Vasodilation
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Zusammenfassung:	During apnoea, the pial artery is subjected to two opposite physiological processes: vasoconstriction due to elevated blood pressure and vasorelaxation driven by rising pH in the brain parenchyma. We hypothesized that the pial artery response to apnoea may vary, depending on which process dominate. Apnoea experiments were performed in a group of 19 healthy, non-smoking volunteers (9 men and 10 women). The following parameters were obtained for further analysis: blood pressure, the cardiac (from 0.5 to 5.0Hz) and slow (
ISSN:	0026-2862 1095-9319
DOI:	10.1016/j.mvr.2017.03.010