ACIST -Diastolic Pressure Ratio (dPR)
Non-hyperemic index for coronary physiology. ACIST diastolic pressure ratio (dPR), using the ACIST RXi Rapid Exchange System and Navvus MicroCatheter, provides a non-hyperemic alternative for physiological assessment of coronary disease.
Reducing costs, time and patient discomfort
Non-hyperemic pressure ratios, such as dPR, may reduce patient discomfort*, cost** and procedural time.***
- Reduced Patient Discomfort
- Reduced Cost
- Reduced Time
ACIST dPR algorithm
ACIST dPR is the ratio of Pd to Pa at the peak-to-peak midpoint, averaged over 5 consecutive heartbeats. ACIST dPR does not rely on an ECG signal to make the calculation.
BeatCheckTM is a signal quality monitoring algorithm to identify ectopic rhythms in the hemodynamic waveform (i.e. premature ventricular contractions and arrhythmias).
Purpose
The data collected during the ACIST-FFR clinical study was retrospectively assessed by an independent, physiologic core laboratory to support ACIST’s dPR algorithm on the ACIST RXi system.
The dPR value was calculated by the application of ACIST’s fully automated off-line dPR software algorithm. iFRcalc was calculated off-line, by the same core lab, based on the original description of its derivation to determine a final value for iFR.2
- ACIST dPR is highly correlated with iFRcalc
- ACIST dPR provides similar diagnostic accuracy as iFRcalc