 Message and data rates may apply. You may receive up to four messages a month, and you may text STOP to stop. This message furnished by the National Association of Broadcasters, the Minnesota Broadcasters Association, and this station. A message from Little Falls Radio and local physicians of knowing the signs about heart attacks. Every 40 seconds, someone in the U.S. has a heart attack. That's nearly 800,000 Americans each year. A heart attack occurs when blood flow to the heart is blocked.