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.
Call the American Airlines reservation line. Young adults traveling alone cannot have a ticket booked online -- the reservation must be booked over the phone. At the time of publication, a reservation representative may be reached at 800-433-7300 around the clock.