Resting Indices

All resting indices—including Pd/Pa, diastolic pressure ratio (dPR) and iFR— provide clinically equivalent results and all indices in the dPR class are numerically identical and verified by clinical evidence.

How dPR Measures Up

  1. Measuring different parts of diastole yields numerically identical results to iFR using the 0.89 cutoff
  2. dPR is as accurate to iFR as two iFR measurements are to each other
  3. Due to class effect, the DEFINE-FLAIR and iFR-Swedeheart studies provide clinical evidence for dPR. All studies, cutoffs and clinical recommendations for iFR can be applied 1:1 to dPR.

Class Effect Among Resting Indices

Watch Prof. Keith Oldroyd, Dr. Ziad Ali, and Dr. Luis Raposo discuss the class effect among all resting indices on PCRTV. Learn about new options in resting indices, including dPR, that were presented at EuroPCR and why measuring different parts of diastole yields numerically identical results to iFR.