My mother-in-law, she passed away two years ago due to stroke. 10 months before the stroke, she was diagnosed with Afib. Dr. gave her blood thinner, she took them, she felt tired but okay. In 4 months there was a GI bleeding due to blood thinner. Dr. gave her some other meds and fixed the bleeding. And then, she stopped her blood thinner without telling my husband, she also took some herb medicine from one of her friends, every day I think. One day she fell to the floor with half of her body not movable. She was sent to ER, the ER doctors performed surgery immediately. The ER doctor explained to me how they were going to do, it didn't sound the worst situation, the doctor was confident. The surgery didn't end for 3 hours, an assistant came back and forth and two more doctors went into the operation room. In 4 hours, she was sent to ICU. It turned out, her heart was continuously making new blood clot, the doctors took out one blood clot from one vessel, the other blood vessel was then suddenly blocked. They to