My 56-year-old son-in-law is a high-powered executive who suffered a major heart attack some 8-10 years ago. He takes medication for high blood pressure. He was talking to my daughter today and began speaking incoherently. Not slurring his words, just saying things that didn't make sense. His exec asst called 911 and the firemen who responded said he looked just fine physically but he's not making sense. They rushed him to the hospital. Could this be the result of a stroke?