All cardiologists have training and accreditation in Echocardiography. Performing the test is not difficult and getting a good video of the whole thing is part of the machinery and routine. It is the interpretation of the result that requires experience, fortunately it is simple to send the echo video once acquired over the internet to someone else. Not all PFOs are equal but it is easy to tell if there is one at all, it is when there is one but small that the question of experience comes in. A bubblecho cardiogram is so sensitive today that seeing a few bubbles crossing the interatrial septum may not be significant. Though given the seriousness of the bend it may well be. Take a USB memory stick with you and see if they will give you a copy of it. It is after all your health record.