my wife is suffering from TIA.All the tests like MR angiogram,EEG,CT can,Dooppler test are normal .She is not diabetic nor blood pressure .ALl her blood analysisi .lipids.tryglecerides ,LDL.HDL are quitre normal.what care to be taken,she got it two times ina span of 3 months w.first time it was for 1 hr second time it was for 30mint. kindly advise her ageis 45 years wt 51 kg ht 4 11

Summarized question: What causes TIA?