POLARIS

Multi-Modality Guidance System

Measure for Measure

You have options in coronary physiology.

  • FFR calculates the maximum flow down a vessel in the presence of stenosis compared to maximum flow in the hypothetical absence of the stenosis.
  • DFR* (dPR) calculates a diastolic portion of the cardiac cycle at rest.
  • Measuring different parts of diastole yields numerically identical results.
  • Pd/Pa calculates the entire cardiac cycle at rest.  
 

FFR

DFR* (dPR)

Pd/Pa

Type

Whole-cycle

Diastolic

Whole-cycle

Cutoff

0.80

0.89

0.91

No Hyperemic Agent Required

X

Inclusion in Appropriate Use Criteria1,2

Workhorse Pressure Guidewire Available

History of Coronary Physiology

History of Coronary Physiology with Morton J. Kern
Watch Morton J. Kern, MD present the complex and fascinating history and developments in coronary physiology at CRT18 including invasive functional testing and current pressure wire technology.

Which Physiology Test to Use When and Why?

Which Physiology Test to Use When and Why?
Watch Ziad A. Ali, MD at CRT18 present the choices in coronary physiology and discuss when to use FFR, dPR or Pd/Pa.
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