There are multiple definitions:

1. biceps brachii short head(English)

   • BLH
   • Anatomy, Musculoskeletal system

2. basal septal hypertrophy(English)

   • HTN
   • Cardiology, Hypertension
   • https://journal…n_basal.11.aspx

3. British Society for Haematology(English)

   • exists to transform patient care through excellence in the study, research and practice of haematology
   • BCSH, BSQR
   • Hematology, Organizations (documentation)
   • https://b-s-h.org.uk/