External pH dependency of delayed afterdepolarization in rabbit myocardium.


Effects of changing external pH on delayed afterdepolarization (DAD) induced by a train of electrical stimuli in the rabbit ventricular papillary muscle fibers were examined using a conventional microelectrode technique in vitro. Preparations were superfused with Tyrode solution containing norepinephrine (3 X 10(-6) M), and the external pH was decreased… (More)


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