There are multiple definitions:

1. topotecan(English)

   • a water soluble semisynthetic analogue of the alkaloid camptothecin which has antitumor activity in preclinical models in vitro and in vivo; aka hycamtin
   • NSCLC, SCLC
   • Oncology, Therapeutic approaches
   • https://doi.org…3543784.6.5.593

2. total perfusion time(English)

   • expressed as minutes; also denoted as TPt
   • ACC, ACCT, cTn-I, Hsp
   • Cardiology, Surgery
   • https://doi.org…246-021-02759-y
   • https://doi.org…0/CVJA-2016-066

3. time to peak torque(English)

   • ACL, ACLR, HK, IKDC, JAPT, RD, PT, ER, H/Q
   • Musculoskeletal system, Sports medicine, Biophysics, Orthopedics
   • https://doi.org…edicina58091187
   • https://doi.org…nostics13172787