What is an aortic dissection? The medical emergency revealed as Lindsey Graham’s cause of death

Sen. Lindsey Graham’s cause of death Saturday evening was an aortic dissection, according to a Washington, D.C., medical examiner, following the South Carolina Republican’s office saying he died following a “brief and sudden illness.” Prior to his death, Graham was diagnosed with arteriosclerotic cardiovascular disease, which was the main factor that led to the aortic…