Trigeminal Neuralgia
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A stoke event would have been picked up on MRI, especially the T2 weighted and FLAIR images. You might have had trigeminal neuralgia as your sedimentation rate was up. Without examining you I can't say for sure. About fixing your heart, if you have no right-to-left shunting of blood through the foramen ovale you wouldn't need to have the patent foreman ovale fixed. If you do have this shunting problem, it might be a good idea to see a cardiologist about getting it closed as you have multiple risk factors for a stroke. Talk things over with your neurologist. It is difficult to answer your question about why. There are things that can give you symptoms as you describe and many of them can be diagnosed by MRI and eye exam.
Sincerely,
CCF Neuro MD