There are multiple definitions:

1. ischemic heart disease(English)

   • has a high prevalence and mortality rate, imposing a heavy burden on patients and society, and there is still a need to optimize treatment options
   • CAD, SIHD, LMIC, PM, COPD
   • Cardiology, Air pollution
   • https://doi.org…sis.2023.01.013
   • https://doi.org…res.2022.114604

2. intermittent hemodialysis(English)

   • AKI, CRRT
   • Nephrology, Therapeutic approaches

3. index of height decentration(English)

   • a corneal topometric index which measures vertical decentration of elevation data calculated using Fourier analysis on a ring with a radius of 3 mm, expressed in μm
   • CDVA, CKI, CXL, ICL, ICRS, IHA, ISV, KI, LASIK, UDVA
   • Ophthalmology
   • https://doi.org…ijo.IJO_2111_20
   • https://doi.org…598-022-09160-6