<qa>  What is one of the recently introduced devices for which early good patency rate has been demonstrated?Dealing with the same problem, a few proximal anastomotic devices have been introduced and most of them withdrawn from the market because of inferior patency rate. The Heartstring proximal anastomotic device is one of the recently introduced devices for which early good patency rate has been demonstrated. The advantages, in terms of less brain embolization or improved neurologic outcome, have never been demonstrated for the Heartstring or any other anastomotic device. 