zaur khasanovich shubushev.doctor of medical sciences, professor, chief cardiologist , center for cardiovascular pathology, jsc russian railways. come see us in the morning. good morning. first of all, i want to know what blood clots are. here it is very important to understand two things the first is. we have blood clots. these are blood clots. who grows in a certain vessel and blood clots. embals. it's this clot that broke off. god forbid flew away somewhere blood flow. what do they come from. this is a well- known phenomenon in medicine. the so-called triad of virchow is required, that is, three conditions are required for us to have this, we need some kind of problem of the vascular wall. it needs to slow down the natural blood flow. and it must be some kind of damage in this vascular cell, but there are risk factors, that is, that predispose. these are various cardiovascular diseases, for example, with atherosclerosis, the wall of a blood vessel is already damaged. same can occur with hypertension, mechanic