What happens when someone is born with only half of a working heart?  Remarkably, this is what happens in babies born with a rare congenital heart defect called Hypoplastic Left Heart Syndrome (HLHS). Physician/scientist Dr. Paul Grossfeld studies HLHS...

The heart is a remarkable thing. At 21 days after conception, it's the first organ in the body to develop and function, and 99% of the time, everything in its development goes perfectly.  However, for 1% of babies, something in this process goes wrong,...