About: Step Responses of Electrical and Mechanical Heart Activity

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Step responses of electrical and blood pressure signals were measured in 19 patients with a BIOTRONIK pacemaker implanted as a response to sudden change of heart rate. The main aim of the study was to look for similarities between the shape of the QT and blood pressure signals transient responses. The time evolutions of QT intervals, systolic and diastolic blood pressure, pulse pressure and maximal derivative of blood pressure were measured. Averaged results synchronized with heart rate change for steps UP (45 steps) and DOWN (55 steps) are presented. Only fast changes or sharp spikes, generally of a duration of only one beat, exist on transient responses of blood pressure signals. Such changes may be explained by changes in heart filling. The QT step response has a well-known shape given by two parts - the immediate change and the slow adaptation. The immediate change of QT intervals may have the same origin as fast changes of blood pressure signals, and may also depend on heart filling, but this hypothesis requires confirmation or rejection by measurements on an isolated heart. The slow adaptation that exists in QT reaction does not exist in blood pressure signals. Step responses of electrical and blood pressure signals were measured in 19 patients with a BIOTRONIK pacemaker implanted as a response to sudden change of heart rate. The main aim of the study was to look for similarities between the shape of the QT and blood pressure signals transient responses. The time evolutions of QT intervals, systolic and diastolic blood pressure, pulse pressure and maximal derivative of blood pressure were measured. Averaged results synchronized with heart rate change for steps UP (45 steps) and DOWN (55 steps) are presented. Only fast changes or sharp spikes, generally of a duration of only one beat, exist on transient responses of blood pressure signals. Such changes may be explained by changes in heart filling. The QT step response has a well-known shape given by two parts - the immediate change and the slow adaptation. The immediate change of QT intervals may have the same origin as fast changes of blood pressure signals, and may also depend on heart filling, but this hypothesis requires confirmation or rejection by measurements on an isolated heart. The slow adaptation that exists in QT reaction does not exist in blood pressure signals. (en)
Title	Step Responses of Electrical and Mechanical Heart Activity Step Responses of Electrical and Mechanical Heart Activity (en)
skos:prefLabel	Step Responses of Electrical and Mechanical Heart Activity Step Responses of Electrical and Mechanical Heart Activity (en)
skos:notation	RIV/68081731:_____/12:00386610!RIV13-GA0-68081731
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP102/12/2034), P(ME09050)
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Vondra, Vlastimil Jurák, Pavel Halámek, Josef Leinveber, Pavel
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav přístrojové techniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	171384
http://linked.open...ai/riv/idVysledku	RIV/68081731:_____/12:00386610
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	electrical and mechanical heart activity; blood pressure signals (en)
http://linked.open.../riv/klicoveSlovo	blood pressure signals electrical and mechanical heart activity
http://linked.open...ontrolniKodProRIV	[5960BFAF813F]
http://linked.open...v/mistoKonaniAkce	San Diego
http://linked.open...i/riv/mistoVydani	Piscataway
http://linked.open...i/riv/nazevZdroje	Engineering in Medicine and Biology Society (EMBC), 2012 34th Annual International Conference of the IEEE
http://linked.open...in/vavai/riv/obor	FA
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	The analysis of dynamic and static properties of QT intervals Analysis of Relationship between Electrical Activity and Blood Flow at the Heart Ventricles
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Novák, M. Halámek, Josef Jurák, Pavel Vondra, Vlastimil Leinveber, Pavel Lipoldová, J. Couderc, J. P.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2012-08-28 (xsd:date)
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	IEEE
https://schema.org/isbn	978-1-4244-4119-8

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