Potassium channels regulate tone in rat pulmonary veins.


Intrapulmonary veins (PVs) contribute to pulmonary vascular resistance, but the mechanisms controlling PV tone are poorly understood. Although smooth muscle cell (SMC) K(+) channels regulate tone in most vascular beds, their role in PV tone is unknown. We show that voltage-gated (K(V)) and inward rectifier (K(ir)) K(+) channels control resting PV tone in… (More)


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