Questions about infant heart murmurs

I have some questions about heart murmurs in infants:

Are newborn heart murmurs ever severe enough to necessitate surgery right away after birth? Do they have a name?
What are the odds of a heart murmur this severe?
How long would the surgery typically take? What is the mortality rate for newborns who undergo this type of surgery?

thank you

[peekawho]

A heart murmur is simply a symptom.  Heart murmurs can be completely benign (meaning, they cause no harm at all) or a symptom of a very serious heart defect.

If you have a concern about a heart murmur in a newborn, the baby's doctor would have to tell you what they think suspect the problem is from.  Most heart murmurs can simply be watched, if there is no other accompanying symptoms of difficulties present with the infants health.

Usually, a chest Xray, EKG, and ultrasound of the heart is done if the doctor is concerned about a newborn heart murmur.