What is the fine-grained topic of the following text: In the 2018-19 Best Hospitals ranking of U.S. News & World Report, the Cardiology & Heart Surgery specialty at Sentara Heart Hospital was recognized as #32 among the top 50 programs in the nation. Only return the topic.
Ranking of Sentara Heart Hospital in the 2018-19 Best Hospitals ranking by U.S. News & World Report.