Hi, My 5 years 10 months son was diagnosed with a tiny PDA (measurements PDA at PA end 1.1 mm). He had a normal birth, he is a normal child, he has no history of any conditions. I wasn't able to identify this issue until now because none of the doctors in the past found he had a murmur in his heart. Two days back when I took him to get his 5 years vaccination, its was a general check up by the pediatrician before vaccine and she found this murmurs and directed me to a pediatric cardiologist, and he took a echocardiography and ruled out this issue. The doctor told me not to worry because its a tiny PDA and he didn't recommend any cardiac medication or intervention at the moment as there is no LA/LV volume overload or PHT. He told he will review in another 6 months to see it the PDA has closed by its own and if it haven't, then we need to do a non surgical PDA closure procedure. The diagnosis was structurally and functionally normal heart except a tiny PDA. The report says: Ductus: tiny PDA left to right shunt (measurement PDA at PA end 1.1 mm Apart from that the other areas are all normal. I am a very concerned mother and he is my only son. After hearing this I am completely depressed and going through a lot of pain, even though the doctor convinced me its nothing to worry, I am unable to be normal. After the diagnosis I have been researching day and night regarding this and found out a lot about this issue. I read in many places that a PDA usually closes by its own before the age of 5, and if it doesn't it need to be closed by that PDA closure procedure. Why did my doctor give another 6 months to see if it will close on its own because my son is now 5 years 11 months. I also read in another place that PDA less than 2 mm need not to be closed, and the only reason it need to be closed due to the risk of IE and some doctors are suggesting that PDA can be only closed by the arterial route, increasing the risk of vascular damage just for limiting the benefit regarding prevention of developing IE in case of a tiny PDA. I am now totally confused whether PDA closure procedure is a risky for a tiny PDA or keeping it open is a risk. Please give me your genuine opinion regarding this and give me some comfort.