HeartAlarm™ Wristwatch — The HeartAlarm™ warns its wearer an hour or more before a heart attack occurs. Designed to be worn by everyone over the age of 40, this device could prevent as many as one million deaths annually, worldwide.HeartAlarm™ Wristwatch — The HeartAlarm™ warns its wearer an hour or more before a heart attack occurs. Designed to be worn by everyone over the age of 40, this device could prevent as many as one million deaths annually, worldwide.