There are multiple definitions:

1. intraventricular conduction defect/delay(English)

   • CRT, ESS, ESSsep, SLICE-ESSsep, AiCM, CLBBB, CMP, cRBBB, ESVI, LBB, LBBAP, LBBP, PM, LVEF, LVSP, PICM, RVP, sV6RWPT, TVPM
   • Electrophysiology, Cardiology, Medical imaging
   • https://doi.org…GING.120.012350
   • https://doi.org…thm.2025.08.041

2. inferior vena cava diameter(English)

   • as measured by pulmonary ultrasound offers an alternative technique for estimating the intra-vascular volume
   • CHF, HF, PU
   • Ultrasound, Pulmonology, Cardiology, Vessel properties, Anatomy
   • https://doi.org…JHM.2021.207097