Dr. Julio Palmaz changed the face of interventional cardiology when he invented the balloon-expandable stent in the 1980s. Yet the rate of progress in new development has stagnated in recent decades, he said, despite technological advancements. At Piedmont Heart’s Napa Valley Cardiology Conference, the owner of nearby Palmaz Vineyards called for a “fundamental change of direction.” Hear why the future may lie in nanotechnology.