An echocardiogram (also called an echo) is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer.
Follow the above dialing format while making a call From Australia to United States. 1  0011 - Exit code for Australia, and is needed for making any international call from Australia. 2  1 - ISD Code or Country Code of United States. 3  Area code-There are 291 area codes in United States.
Calling Venezuela from the United States explained: 1  011 - US exit code; dial first for international calls made from the USA or Canada. 2  58 - Country Code for Venezuela. 3  Phone Number (may not begin with 0) - 10 digits, area code included for fixed lines.