I'm 54, female, and have hypertension, shortness of breath, dizziness, and fatigue. I went blind in one eye for several hours and then again for only a few minutes and was diagnosed as having a TIA and went on Plavix. An event monitor showed I had many PACs, short runs of SVT's and several short Atrial runs. A recent Echocardiogram indicated a possible hole in my heart. I was referred to a cardiologist who did a TCD Bubble test which said, Bubbles were detected with and without Valsalva, which indicates a possible Patent Foramen Ovale and further TEE or/and clinical correlation is essential. I was given the results yesterday and my doctor asked that I have an MRI to rule out other causes of the TIA, see an ENT for the dizziness, and will consult with me in a few weeks. My question is, how can a TCD Bubble test tell if the hole in my heart is a PFO? What tests determine the type of defect it is? Thanks for any help as I have not been told what the next steps will be.