Mechanical aspects of heartbeat reversal in pupae of Manduca sexta.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077395%3A_____%2F03%3A60033088" target="_blank" >RIV/60077395:_____/03:60033088 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Mechanical aspects of heartbeat reversal in pupae of Manduca sexta.
Original language description
Pulsations of the dorsal vessel were investigated with new optocardiographic techniques based on the transmission and reflection of pulse-light through optic fibers. This noninvasive technique enabled simultaneous, in vivo multisensor recordings of the heartbeat without touching the pupal integument. There was a very regular heartbeat reversal with 3 distinctive phases: (a) a backward-oriented (retrograde) cardiac pulsation; (b) a forward-oriented (anterograde) pulsation with faster frequency; and (c) shorter or longer periods of temporary cardiac standstill that usually occurred after the termination of the anterograde phase. Occasionally, there were localized series of systolic cardiac contractions during the retrograde phase. Simultaneous recordingsfrom the base and the tail of the abdomen revealed a reciprocal, 'mirror image-like', quantitative relationship. The most intensive anterograde hemolymph flow occurred at the base while the most intensive retrograde flow occurred at the
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
ED - Physiology
OECD FORD branch
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Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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