STAT+: Doctors have questions about the Watchman. Boston Scientific has a sales pitch.

So far, doctors have implanted more than 800,000 devices in patients around the world. Raphael Chinca/Globe Staff Despite all the setbacks, Boston Scientific won’t stop pushing the Watchman. The medical-device giant committed hundreds of millions to acquire the tiny heart implant more than a decade ago, and then endured a years-long debate at the Food and Drug Administration over whether to approve it. When that approval finally came through, for a limited pool of patients, Boston Scientific was prepared with a plan for something much larger. STAT+ Exclusive Story Already have an account? Log in This article is exclusive to STAT+ subscribers Unlock this article — and get additional analysis of the technologies disrupting health care — by subscribing to STAT+. Already have an account? Log in View All Plans To read the rest of this story subscribe to STAT+. Subscribe Elizabeth Koh and Liz Kowalczyk — Boston Globe