There are multiple definitions:

1. left atrial isomerism(English)

   • LA
   • Cardiology

2. long-acting injectable(English)

   • may be a major challenge in the prevention and treatment of schizophrenia
   • AST
   • Therapeutic approaches, Preventive medicine
   • https://doi.org…ubh.2022.951544

3. lateral ankle instability(English)

   • deficits in sensory pathways caused by peripheral edema, pain, and inflammation of the damaged ligaments may induce maladaptive changes within the central nervous system
   • CNS
   • Orthopedics
   • https://doi.org…ams.2021.06.013

4. Lupus Activity Index(English)

   • index with 5 domains that reflect the disease activity in the previous 2 weeks and is completed by the physician in about a minute. As in the rest of the indices, only those manifestations attributable to SLE were evaluated. It includes PGA VAS from 0 to 3
   • PGA, SLE, SLEDAI, VAS
   • Autoimmunity
   • https://doi.org…mae.2014.01.011