Cardiovascular changes under normoxic and hypoxic conditions in the air-breathing teleost Synbranchus marmoratus: importance of the venous system

Research output: Contribution to journalArticle

Standard

Cardiovascular changes under normoxic and hypoxic conditions in the air-breathing teleost Synbranchus marmoratus: importance of the venous system. / Skals, M; Skovgaard, N; Taylor, Edwin; Leite, CAC; Abe, Augusto; Wang, Tobias.

In: Journal of Experimental Biology, Vol. 209, 15.10.2006, p. 4167-4173.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{df9591312f934da4a558e143d9edbd97,
title = "Cardiovascular changes under normoxic and hypoxic conditions in the air-breathing teleost Synbranchus marmoratus: importance of the venous system",
abstract = "Synbranchus marmoratus is a facultative air-breathing fish, which uses its buccal cavity as well as its gills for air-breathing. S. marmoratus shows a very pronounced tachycardia when it surfaces to air-breathe. An elevation of heart rate decreases cardiac filling time and therefore may cause a decline in stroke volume (V(S)), but this can be compensated for by an increase in venous tone to maintain stroke volume. Thus, the study on S. marmoratus was undertaken to investigate how stroke volume and venous function are affected during air-breathing. To this end we measured cardiac output (Q), heart rate (f(H)), central venous blood pressure (P(CV)), mean circulatory filling pressure (MCFP), and dorsal aortic blood pressures (P(DA)) in S. marmoratus. Measurements were performed in aerated water (P(O2)>130 mmHg), when the fish alternated between gill ventilation and prolonged periods of apnoeas, as well as during hypoxia (P(O2)",
keywords = "cardiac filling, Synbranchus marmoratus, normoxia, venous tone, venous return, stroke volume, hypoxia, mean circulatory filling pressure, air-breathing fish, adrenergic regulation",
author = "M Skals and N Skovgaard and Edwin Taylor and CAC Leite and Augusto Abe and Tobias Wang",
year = "2006",
month = oct,
day = "15",
doi = "10.1242/jeb.02459",
language = "English",
volume = "209",
pages = "4167--4173",
journal = "Journal of Experimental Biology",
issn = "0022-0949",
publisher = "The Company of Biologists Ltd.",

}

RIS

TY - JOUR

T1 - Cardiovascular changes under normoxic and hypoxic conditions in the air-breathing teleost Synbranchus marmoratus: importance of the venous system

AU - Skals, M

AU - Skovgaard, N

AU - Taylor, Edwin

AU - Leite, CAC

AU - Abe, Augusto

AU - Wang, Tobias

PY - 2006/10/15

Y1 - 2006/10/15

N2 - Synbranchus marmoratus is a facultative air-breathing fish, which uses its buccal cavity as well as its gills for air-breathing. S. marmoratus shows a very pronounced tachycardia when it surfaces to air-breathe. An elevation of heart rate decreases cardiac filling time and therefore may cause a decline in stroke volume (V(S)), but this can be compensated for by an increase in venous tone to maintain stroke volume. Thus, the study on S. marmoratus was undertaken to investigate how stroke volume and venous function are affected during air-breathing. To this end we measured cardiac output (Q), heart rate (f(H)), central venous blood pressure (P(CV)), mean circulatory filling pressure (MCFP), and dorsal aortic blood pressures (P(DA)) in S. marmoratus. Measurements were performed in aerated water (P(O2)>130 mmHg), when the fish alternated between gill ventilation and prolonged periods of apnoeas, as well as during hypoxia (P(O2)

AB - Synbranchus marmoratus is a facultative air-breathing fish, which uses its buccal cavity as well as its gills for air-breathing. S. marmoratus shows a very pronounced tachycardia when it surfaces to air-breathe. An elevation of heart rate decreases cardiac filling time and therefore may cause a decline in stroke volume (V(S)), but this can be compensated for by an increase in venous tone to maintain stroke volume. Thus, the study on S. marmoratus was undertaken to investigate how stroke volume and venous function are affected during air-breathing. To this end we measured cardiac output (Q), heart rate (f(H)), central venous blood pressure (P(CV)), mean circulatory filling pressure (MCFP), and dorsal aortic blood pressures (P(DA)) in S. marmoratus. Measurements were performed in aerated water (P(O2)>130 mmHg), when the fish alternated between gill ventilation and prolonged periods of apnoeas, as well as during hypoxia (P(O2)

KW - cardiac filling

KW - Synbranchus marmoratus

KW - normoxia

KW - venous tone

KW - venous return

KW - stroke volume

KW - hypoxia

KW - mean circulatory filling pressure

KW - air-breathing fish

KW - adrenergic regulation

U2 - 10.1242/jeb.02459

DO - 10.1242/jeb.02459

M3 - Article

C2 - 17023609

VL - 209

SP - 4167

EP - 4173

JO - Journal of Experimental Biology

JF - Journal of Experimental Biology

SN - 0022-0949

ER -