Reversing Regurgitant Physiology: Pressure-Volume Insights After Dedicated TAVR for Pure Aortic Regurgitation.

Background

Dedicated transcatheter aortic valve replacement (TAVR) devices for the treatment of pure aortic regurgitation (AR) have emerged as an alternative to surgery for patients at high or prohibitive operative risk. However, the immediate hemodynamic effects of TAVR in this setting remain poorly characterized. CASE SUMMARY An 81-year-old man with symptomatic severe native AR underwent transfemoral TAVR using a dedicated valve system. Invasive pressure-volume analyses were performed immediately before and after valve implantation.

Discussion

TAVR resulted in rapid left ventricular (LV) unloading, with reductions in end-diastolic volume and filling pressure, restored isovolumetric relaxation phase, while effective arterial elastance increased (1.25-1.52 mm Hg/mL) after elimination of regurgitant flow. End-systolic elastance increased (1.59-1.95 mm Hg/mL), with preserved ventriculo-arterial coupling. These acute physiological changes were accompanied by early symptomatic improvement and reduced diuretic requirements. TAKE-HOME MESSAGE Dedicated TAVR for pure native AR results in immediate favorable changes in LV mechanics, including volume unloading and improved LV contractility.