In the decades that followed World War II, the hospital continued to expand and build, adding a new East Wing, and in 1981, a new inpatient tower, the $104 million Snyder Pavilion. AGH also continued to push the boundaries of medicine and research in those decades, particularly in the areas of thoracic surgery, shock trauma care, cancer treatment, orthopaedic surgery, organ transplants and, most notably, open-heart surgery. Built on the foundation laid by world renowned surgical pioneer George Magovern, by 1998, AGH was performing more than 1,500 open-heart procedures annually, the largest volume of any hospital in the state, serving patients from across the country and around the world. Today, Allegheny General is a 552-bed quaternary care and educational hospital, and it is AHN's highest-volume hospital, seeing 24,000 inpatient admissions, 23,000 surgeries, and nearly 56,000 emergency department visits each year. Over the last five years, AGH has invested in a new orthopaedic center, a new cardiovascular intensive care unit, a new cardiac MRI center, new hybrid operating rooms, an ambulatory surgery center and some of the world's most technologically advanced surgical robots.