There are multiple definitions:

1. head-down tilt(English)

   • CBV, HUT, COPD, DH, LVESV, LVEDV, LVSV, nITP, DFV, GSV
   • Hemodynamics, Pulmonology, Physiology
   • https://doi.org…siol.01109.2016
   • https://doi.org…siol.00480.2023

2. high-dose therapy(English)

   • followed by autologous stem cell support is widely used as intensification treatment in patients with multiple myeloma (MM) responsive to the initial chemotherapy
   • CR, EFS, MM, OS
   • Chemotherapy, Oncology
   • https://doi.org…/sj.bmt.1704313