QFR is based upon the accurate 3D QCA reconstruction and subsequent frame counting for the calculation of the flow velocity of target vessel without the use of wire nor adenosine.
QFR is easy – it’s calculated from two X-ray angiographic ortogonal projections at least 25° apart. The significance margin are the same as FFR.
QFR is fast – It takes 4 minutes from projection acquisition
QFR is particularly useful for
- Non-culprit lesions in ACS and STEMI patients
- Diabetes and chronic kidney disease
- Small vessel disease
- In diagnostic procedure for all coronary vessels