In an ideal world, every heart attack would end like Willard "Ziggy" Hill's. Within 90 minutes of arriving at a small community hospital in North Carolina, he was having a blocked artery reopened at Duke University Medical Center 25 miles away. "It was like being a car in a pit stop at NASCAR," he said. "I thought 'I am in really good hands.'" Two years ago, he might not have been. North Carolina was a bad place to have a heart attack, scoring below national norms of fast care. Now it may be one of the best. The reason is...