Fig. 2. Total vascular resistance (TVR) in CON, left-atrial ligated (LAL)
and right vitelline artery ligated (VAL) embryos at stages HH21
(P<0.01), HH24 (P<0.01) and HH27 (P=0.04)
(A). VAL increased TVR at all stages. LAL caused an increase in
TVR at HH24 that normalized by HH27. Fundamental impedance
(Z1) in CON, LAL and VAL embryos at HH21
(P<0.01), HH24 (P<0.01) and HH27 (P<0.01)
(B). VAL increased Z1 at all stages. LAL increased
Z1 at HH21 only. Characteristic impedance
(ZC) in CON, LAL and VAL embryos at HH21
(P=0.08), HH24 (P<0.01) and HH27 (P<0.01)
(C). ZC increased after LAL and then normalized by HH24.
ZC was unchanged in VAL embryos at HH21 but increased
significantly at HH24 and HH27. Data are mean ±
S.E.M. *P
0.05,
P
0.1 experimental group versus
CON.