There are multiple definitions:

1. interactive voice response(English)

2. intravitreal ranibizumab(English)

   • in patients with macular edema secondary to branch retinal vein occlusion
   • AMD, BCVA, PRN, VEGF, RBZ, BRVO, CMT, ME, SRT
   • Ophthalmology, Therapeutic approaches
   • https://doi.org…147/DDDT.S86269
   • https://doi.org…90/life13030769

3. isovolumetric relaxation(English)

   • used for assessment of diastolic function, or lusitropy
   • DSR, LV, SR, SRE, SRIVR, DHF, DTI, ECM, EDPVR, HFpEF, IVA, LAP, LACV, LAVI, LVEDP, LVEF, MVO, VTI
   • Cardiology, Myocyte / muscle
   • https://doi.org…NAHA.106.662882
   • https://doi.org…4137/CMC.S18743

4. intra-valvular regurgitation(English)

   • AR, TAV, TAVI, PVR
   • Cardiology
   • https://doi.org…ard.2022.06.014