Dr. William Zoghbi, director of the cardiovascular imaging institute at Methodist Hospital, was recently named president of the American College of Cardiology, taking the high-profile role as the U.S. Supreme Court prepares to rule on the Affordable Care Act. Zoghbi is one of 22 Americans chosen to carry the Olympic torch through Great Britain before the games begin there this summer. He spoke with Houston Chronicle reporter Jeannie Kever about issues facing his field.