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First published online March 22, 2004
Journal of Experimental Biology 207, 1487-1490 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00902

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Ventricular diastolic filling characteristics in stage-24 chick embryos after extra-embryonic venous obstruction

Nicolette T. C. Ursem^1,*, Sandra Stekelenburg-de Vos¹, Juriy W. Wladimiroff¹, Robert E. Poelmann², Adriana C. Gittenberger-de Groot², Norman Hu³ and Edward B. Clark³

¹ Department of Obstetrics & Gynecology, Erasmus MC, Rotterdam, 3000 DR, The Netherlands
² Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, 2300 RC, The Netherlands
³ Department of Pediatrics, University of Utah, Salt Lake City, UT 84113, USA

View larger version (24K): [in a new window]   Fig. 1. An example of simultaneously recorded tracings of atrioventricular flow velocity (solid line) and dorsal aortic blood flow (broken line) in a normal (A) and clipped (B) stage-24 chick embryo. Diastole is partitioned into two components: the passive phase indicated by P and the active phase indicated by A.

View larger version (12K): [in a new window]   Fig. 2. Dorsal aortic (DAo) blood flow and passive (P) and active (A) components of atrioventricular blood flow measured in normal (open bars, N=15) and clipped (filled bars, N=15) chick embryos at stage 24. Data are means ± S.E.M. *P<0.003 vs control.

View larger version (12K): [in a new window]   Fig. 3. Dorsal aortic (DAo) stroke volume and passive (P) and active (A) ventricular filling volumes measured in normal (open bars, N=15) and clipped (filled bars, N=15) chick embryos at stage 24. Data are means ± S.E.M. *P<0.003 vs control.