Passport Change and Visa Maiden Name

[cotton]

Hello,

I have the following query..

My wife has a passport in the name of <First Mainden_Surname> .
She was issued US Visa on 19 Feb 2008 for 10 yr period.
Now her passport is renewed and name change has been done from <First Mainden_Surname> to <First Married_surname> (Surname Change).

We have the marriage certificate too.

Would like to know how does it affect the US Visa which was issued in her previous name.

Would it require new Visa or the existing one will be fine as she is due to travel in 1 month time again to US.

Thanks

[immihelp]

Carry both passports and marriage certificate.