I don’t have any embolism history. Asked my cardiologist’s NP, a few weeks ago, about this subject. She recommended 325mg aspirins, each of two days before flying - keeps blood components slippery. Also, compression leg sleeves (or socks): https://www.amazon.com/gp/product/B01BJVBPO8/ref=ppx_yo_dt_b_asin_title_o08_s01?…