
This spring, viewers in four U.S. metro areas — Tampa, Detroit, San Diego, and Phoenix — saw the first television commercial aired by Boston Scientific, a 38-year-old maker of medical devices.
The ad, aimed at families of the millions of older Americans with irregular heartbeats, portrays a distraught adult daughter driving her father to the hospital. A doctor tells them about one of the Marlborough, Mass., company’s newest products: an implantable device called Watchman that seals a pocket in a patient’s heart chamber to prevent blood clots that can trigger strokes.