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Figure 1 Costs incurred in the cath lab in patients who were randomized to stress perfusion scintigraphy (SPS) vs. fractional flow reserve (FFR). The itemized costs include: registered nurse (RN)/radiologic technologist (RT) cost, post-cath cost (the time that RN and RT spent per patient during and after cardiac catheterization multiplied by the hourly wages), contrast cost (the cost of contrast media used during the catheterization), and equipment cost (the costs of the WaveWire, guiding catheter, and Tuohy steering kit). Values are means ± SEM.