There are multiple definitions:

1. title word abbreviation(English)

   • ISO
   • Biomedical journals, Standards

2. T wave alternans(English)

   • an electrical phenomenon characterized by beat-to-beat alternation of the morphology, amplitude, and/or polarity of the T wave. Often associated with acquired as well as congenital LQTS and is considered an important prognostic indicator in that it is commonly observed just before episodes of TdP
   • LV, TDR, TdP, LQT, LVEF, HRT, MACE
   • Electrophysiology, Cardiology, Pathology
   • https://doi.org…67.2009.01641.x
   • https://doi.org…390/jcm14207209

3. time-weighted average(English)

   • CAES, CCHP, CHR, CNG, CNHC, EFC, IDLH, MSDS, STEL, SMES, BeS, CBD, DOE, DWA, LTW, NIOSH, OEL, OSHA, PEL
   • Energy transition, Pollution and health, Environment, Safety and health
   • https://doi.org…OC.2012.2192469
   • https://doi.org…459620701354747

4. T-wave amplitude(English)

   • the highest peak of the T-wave, being larger in men than in women
   • APD, cAMP, EAD, ECC, ECG, GDX, iPSC, LQTS, LVEF, NCX, RMP, RyR2, SERCA, TdP, VF
   • Electrophysiology, Cardiology, Woman /female, Calcium, Physiology, Hormone, Genomics
   • https://doi.org…001-022-00880-z