Endotronix CEO Harry Rowland, PhD, co-founded the heart sensor company 11 years ago and assumed the CEO role in 2012. Over that span, the company has raised more than $100 million from VCs, found regulatory success in Europe, and now is moving toward seeking approval in the US. What lessons has the first-time CEO learned running a start-up? How has Endotronix managed discouraging news in its space? And, in the past, how often has he asked himself, is this is going to work?