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Figure 2 Costs incurred in the transitional care unit (TCU) in patients who were randomized to stress perfusion scintigraphy (SPS) vs. fractional flow reserve (FFR). The itemized costs include registered nurse (RN) cost in the TCU (the time that RN spent per patient multiplied by the hourly wages), diagnostic lab and SPS costs (the costs of laboratory tests and stress perfusion scintigraphy), and room cost (the cost of dwelling in the monitored bed). Values are means ± SEM.