More details are emerging on the inventor of the artificial heart - and his role as pitchman for a popular cholesterol drug.
ABC News has learned that Dr. Robert Jarvik was paid one-point-3 million dollars for making ads for Lipitor.
And congressional investigators believe those shots of Jarvik rowing were done with a body double to be more athletic-looking.
A congressional committee wants to know if Jarvik, or Pfizer, the maker of the ads, misled people.
Jarvik has a medical degree, but has never had a license to practice medicine.
