Artificial hearts will make up for lack of human ones
The operation, which took place at the Georges Pompidou Hospital in Paris, "went satisfactorily," it said in a statement.
The patient, whom it did not name, "is conscious and speaking to relatives," Carmat said, adding that it was too early to draw longer-term conclusions about the operation.
Artificial hearts have been in use for many years as a temporary fix for patients awaiting a transplant. But tens of thousands die each year because of a lack of available organs.
The Carmat product aims at providing a longer-term solution to bridge the wait, using biological materials and sensors, rather than a pump, to mimick heart contractions.
The company was authorised in September by French health watchdogs to carry out four trials.