It's hard to find a more disappointing stock in the medical device world this year than Edwards Lifesciences (NYSE:EW). This innovative company has rallied behind its Sapien transcatheter heart valve, but Edwards's stock hasn't impressed anyone in 2013: Shares have fallen more than 18% this year to date, even as the stock has recovered some of its losses in 2014.

Competition's breathing down Edwards' throat, even as the company protects its first-mover advantage in the U.S. Edwards won a big injunction in Germany against rival Medtronic (NYSE:MDT) and its competing CoreValve, but Medtronic's still pushing ahead in this growing market. Meanwhile, Boston Scientific (NYSE:BSX) and St. Jude Medical (NYSE:STJ) are moving in on the Sapien with rival products of their own.

Can Edwards hold off the competition in order to establish the Sapien's dominance in the U.S., Japan, and other top markets? In the video below, Motley Fool contributor Dan Carroll tells you what you need to know about this innovative company's flagship product-and whether or not the Sapien can help Edwards's stock bounce back for investors.

Fool contributor Dan Carroll has no position in any stocks mentioned. The Motley Fool owns shares of Medtronic. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.