http://peakprosperity.com/could-these-mysterious-clots-be-the-cause-of-death/
Martenson is a forensic pathologist, so he is more competent than Google to speak to the matter, but is a bit shy about some details nevertheless.
Also, some good things to be aware of, in general, regarding embolisms, heart attacks, etc.
Oh, here is a link Chris M Recommends: http://amidwesterndoctor.substack.com/