There are multiple definitions:

1. high risk register(English)

   • Risk factor

2. heart rate reserve(English)

   • calculated as the difference between heart rate at peak exercise – heart rate at baseline. See chronotropic incompetence
   • APHRR, CI, HR, HFpEF, GSR, ICSDR, ISR, PACS, PALS
   • Cardiology, Difference based metric
   • https://doi.org….1002/ejhf.2146
   • https://doi.org…cho.2018.12.002

3. heart rate recovery(English)

   • a measure of the heart's ability to return to its normal, resting pace after finishing a workout
   • CRI, HR, MPHR, RER, BR, CO, EELV, IC, LV, MCR, OUES, PAP, PCWP, PVR, RAP, SaO2, VCO2, VD/VT, VE, VFL/VT, VO2, VT
   • Cardiology, Diagnostics, Difference based metric
   • https://doi.org….1002/ejhf.2601

4. hospital referral region(English)

   • extensively used in health services research
   • EGS, HSA
   • Hospital, Care giver/provider
   • https://doi.org…000000000000356
   • https://doi.org…83.2020.1798509

5. homologous recombinational repair(English)

   • a major DNA repair pathway that acts on double-strand breaks and interstrand crosslinks, and probably to a lesser extent on other kinds of DNA damage. It provides a mechanism for the error-free removal of damage present in DNA that has replicated (S and G2 phases)
   • ATM, DSB, BER, GGR, MMR, NER, NHEJ, TCR
   • Ataxia, Biochemistry, Regulation / control
   • https://doi.org…5107(01)00115-4
   • https://doi.org…86454-3.00593-5

6. haplotype relative risk(English)

   • IgAN, TDT
   • Nephrology, Genetics, Environment, Risk factor
   • https://doi.org…130858.00688.46