Robert L. Kormos

Robert L. Kormos is a named coauthor of the 1994 primary study estimating ventricular compliance from automated echocardiography and pressure measurements. The publisher supplies the full name and describes the shared isolated-heart measurement experiment.^[ref]

The apparatus makes the reference quantity unusually concrete: an intraventricular balloon supplies known volume changes, rather than inferring every volume from the same image being tested. A micromanometer records pressure, and a computer interface pairs it with short-axis ventricular area.

An original calibration example separates absolute volume from its increments. If a reference has a fixed offset $V_m=V+b$, then $\Delta V_m=\Delta V$ and $d{V}_m/dp=dV/dp$. The offset does not disappear from the reported absolute volumes. If instead $V_m=gV+b$, the inferred ventricular compliance is multiplied by $g$. With true compliance 4 mL/mmHg and $g=1.05$, it becomes 4.2 mL/mmHg. Agreement about increments is therefore different from agreement about the curve's absolute location.

The primary experiment varied balloon volume repeatedly and compared image-area and volume-based pressure relations. Its favorable experimental correspondence and explicit need for clinical validation document a methodological contribution, without establishing an identical result for every chamber or loading condition.^[ref]