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Erschienen in: Medical & Biological Engineering & Computing 5/2008

01.05.2008 | Special Issue

Coronary microcirculation in the beating heart

verfasst von: Fumihiko Kajiya, Toyotaka Yada, Osamu Hiramatsu, Yasuo Ogasawara, Yousuke Inai, Masahito Kajiya

Erschienen in: Medical & Biological Engineering & Computing | Ausgabe 5/2008

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Abstract

The phase opposition of velocity waveforms between coronary arteries (predominantly diastolic) and veins (systolic) is the most prominent characteristic of coronary hemodynamics. This unique arterial and venous flow patterns indicate the importance of intramyocardial capacitance vessels and variable resistance vessels during a cardiac cycle. It was shown that during diastole the intramyocardial capacitance vessels have two functional components, unstressed volume and ordinary capacitance. Unstressed volume is defined as the volume of blood in a vessel at zero transmural pressure. In vivo observation of systolic narrowing of arterioles in mid-wall and in subendocardium indicates the increase in resistance by cardiac contraction.

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Metadaten
Titel
Coronary microcirculation in the beating heart
verfasst von
Fumihiko Kajiya
Toyotaka Yada
Osamu Hiramatsu
Yasuo Ogasawara
Yousuke Inai
Masahito Kajiya
Publikationsdatum
01.05.2008
Verlag
Springer Berlin Heidelberg
Erschienen in
Medical & Biological Engineering & Computing / Ausgabe 5/2008
Print ISSN: 0140-0118
Elektronische ISSN: 1741-0444
DOI
https://doi.org/10.1007/s11517-008-0335-x

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