Hi, i'm 22 and was diagnosed with Sinus Venosus ASD at the end of May 2011. i have had a series of tests and am currently waiting for an MRI. i have only seen the cardiologist twice (between his many long vacations) but the doctor at the hospital who performed a TEE on me thought that i would need open heart surgery within the next 3 months. (this was in early June) i have some of the symptoms such as shortness of breath etc. i would love to hear from anyone who has had anything to do with ASD. i don't know much at all about it and i'm not sure what to expect at all. so, i'd love to hear anything!