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Factors that contribute to ductal constriction after birth.
| High levels of oxygen |
| Low levels of circulating prostaglandins |
| Increase in endothelin-1 |
| Activation of cytochrome P450 |
| Rise in intracellular calcium |
| Decrease in intracellular cAMP and cGMP |
| Inhibition of potassium channels |
| Production of isoprostanes |
| Response to acethycholine |
| Response to norepinephrine |
| Activation of transient receptor potential channels |
| Activation of Rho-kinase family members |
| Release of angiotensin II |
