iKOr System — Coronary Physiology

Anatomical illustration of the heart with coronary arteries

Normal flow

Live scenario

Adjust disease severity and watch how each index reflects a different dimension of the coronary bed — all captured in a single pass with one wire.

FFR 0.93

Fractional flow reserve measures the pressure drop across a coronary stenosis. Values below 0.80 mark a haemodynamically significant epicardial lesion that benefits from revascularisation.

Normal > 0.80 Current 0.93

CFR 2.7

Coronary flow reserve (CFR) is the ratio of blood flow at rest versus maximal hyperaemia. Coronary flow reserve is said to be normal when > 2.5 and represents appropriate augmentation of the combined epicardial and microvascular flow in response to stimulation/demand.

Normal > 2.5 Current 2.7

IMR 18

The index of microvascular resistance isolates the small-vessel bed. Values above 25 suggest microvascular dysfunction — a cause of angina that epicardial imaging alone cannot reveal.

Normal < 25 Current 18

Vessel cross-section · Stenosis 30%

Stenosis 30%

FFR 0.93

Microvascular (IMR) 18

Normal Normal coronary physiology — all three indices within normal limits.

Intuitive. Any workhorse wire. Fast. One pass, three indices. Adaptable. FFR, CFR, IMR — from a single device.