There are multiple definitions:
diastolic functional reserve(English)
- reflects lusitropy
- DT
- Cardiology
- https://heart.b…ontent/95/5/399
diastolic hyperemia-free ratio(English)
- confirms numerical equivalency among resting metrics of coronary artery stenosis
- FFR, iFR, DPR
- Coronary circulation, Ratio-based metric
- https://academi…31/2585/5477838