Felicia Seemann, Einar Heiberg, Christopher G Bruce, Jaffar M Khan, Amanda Potersnak, Rajiv Ramasawmy, Marcus Carlsson, Håkan Arheden, Robert J Lederman, Adrienne E Campbell-Washburn
AIMS: Pressure-volume (PV) loops have utility in the evaluation of cardiac pathophysiology but require invasive measurements. Recently, a time-varying elastance model to derive PV loops non-invasively was proposed, using left ventricular (LV) volume by cardiovascular magnetic resonance (CMR) and brachial cuff pressure as inputs. Validation was performed using CMR and pressure measurements acquired on the same day, but not simultaneously, and without varying pre-loads. This study validates the non-invasive elastance model used to estimate PV loops at varying pre-loads, compared with simultaneous measurements of invasive pressure and volume from real-time CMR, acquired concurrent to an inferior vena cava (IVC) occlusion...
January 2024: Eur Heart J Imaging Methods Pract