Observed arrival · 2026-08-31
AS Hemodynamics Lab
An interactive teaching nomogram for exploring how flow rate, valve area, and pressure gradients relate in aortic stenosis.
Field notes
The lab derives flow rate from stroke volume and left-ventricular ejection time, then compares a user-entered gradient with the value predicted from a simplified Gorlin relationship. Its chart supports multiple frozen comparison points and displays indexed AVA, stroke-volume index, cardiac output, and a descriptive phenotype. The page gives 200 mL/s as a flow threshold and 35 mL/m² as a low-stroke-volume threshold, while warning that the model is not interchangeable with Doppler continuity-equation AVA.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue