True statement about ductus aeriosus is:

IMPOANT POINTS ABOUT DUCTUS AERIOSUS: - Physiological closure: occurs almost immediately after bih by contraction of muscular wall - Anatomic closure: occurs by proliferation of intima in 10-21 days after bih - After obliteration, it forms ligamentum aeriosum. - Murmur due to PDA - Continuous machinery murmur. - Ductus aeriosus is kept open with the help of prostaglandins in ductus dependent conditions Note : Prostaglandin inhibitors are used to close the ductus aeriosus. Intravenous (IV) indomethacin or ibuprofen is used to treat patent ductus aeriosus (PDA) in premature infants.