Some add game or nap rooms, expansive art-filled atriums, hiking trails or private meditation rooms with music and adjustable lighting.

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Jude's device, called the Amplatzer PFO Occluder, is used to seal a flap-like passageway between the left and right atriums of the heart.

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It is a baffling combination of towers, hemicycles, courtyards, conference rooms and tree-filled atriums, all linked together by glass lifts and dark, leather-lined corridors.

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Dozens of doctors from around the country came to tour the patient-friendly clinics, which were complete with atriums that let sunlight into the treatment theaters.

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And he points to the popularity of atriums or courtyards that bring the natural environment into a building as one way the principles of feng shui are manifested in modern architecture.

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About 93 percent of 3, 040 large U.S. hospitals used one or more day lighting or lighting conservation features, including tinted window glass (80 percent), reflective window glass (39 percent), external overhangs or awnings (47 percent), skylights or atriums designed to provide light (57 percent), automatic controls or sensors that increase or reduce lighting in response to the level of natural light (14 percent), and occupancy sensors that reduce lighting when rooms are unoccupied (46 percent).

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