Coronary pressure measurements: catheter induced errors

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Figure 1  .

(A) Percentage error for various CVPs. Data are shown for FFRs of 0.6, 0.7, and 0.8. A CVP between 5 and 10 mm Hg can incur a significant error if ignored. (B) Percentage error for various diameter vessels. Data are shown for stenosis of 30%, 40%, and 50%. Data for 0.018" (Old) catheters is shown compared to the newer 0.014" (New) catheters, so that the advance in catheter technology can be appreciated.