Aerial view of downtown Fort Worth, Texas. Some hospitals in Texas and around the U.S. are seeing high profits, even as their bills force patients into debt. Of the nation’s 20 most populous counties, none has a higher concentration of medical debt than Tarrant County, home to Fort Worth. Jupiterimages/Getty Images hide caption toggle caption Jupiterimages/Getty Images Aerial view of downtown Fort Worth, Texas. Some hospitals in Texas and around the U.S. are seeing high profits, even as their bills force patients into debt. Of the nation’s 20 most populous counties, none has a higher concentration of medical debt than Tarrant County, home to Fort Worth. Jupiterimages/Getty Images PROSPER, Texas…