Biomedical Engineering Reference
In-Depth Information
Fig. 3.
Pacemaker current
I
f
in embryonic murine ventricle. Panel
a
action potentials at stage
9.5 days post coitum (
dpc
). Panel
b
action potentials at stage 18 dpc. Panel
c
activation of
I
f
upon hyperpolarizing pulses at 9.5 dpc. Panel
d
activation of
I
f
upon hyperpolarizing pulses at
18 dpc.
Right panel
Expression of HCN1 mRNA, HCN2 mRNA and HCN4 mRNA at 9.5 and
18 dpc. Compiled from [66].
Fig. 4.
Action potentials of a single sinus node cell isolated from a rabbit sinus node. There is
no beat-to-beat regularity.
Horizontal bar
100 ms.
Vertical bar
50 mV. Reproduced with
permission from [43].
