= Akihiko Kawai
{c}
\b[<Akihiko Kawai>] is a verified coauthor of the 1994 study estimating <ventricular compliance> by automated <echocardiography> and paired pressure measurements. The publisher supplies the full name. An intraventricular balloon provided volume, a micromanometer supplied <pressure> and short-axis boundary detection supplied ventricular <area> in six perfused dog hearts.<Estimation of left ventricular compliance using on-line echocardiographic automated border detection and pressure data by John Gorcsan III and others>[Publisher full byline; abstract, experimental preparation]{ref}
The scientific target is a chamber's pressure-volume behavior. A chamber can have the same volume in two mechanical states while requiring different distending pressures; volume alone does not identify compliance.
For an original pair of linear passive models, take $p_1=0.2(V-10)$ and $p_2=0.4(V-10)$, with volume in mL and pressure in mmHg. At $V=30$ mL, the pressures are 4 and 8 mmHg. The corresponding compliances are $dV/dp_1=5$ and $dV/dp_2=2.5$ mL/mmHg. Equal volume therefore coexists with a twofold difference in this derivative. These are explanatory chambers, not measurements or reference values from Kawai's study.
The experiment tested whether the image-derived pressure-area relation could track a known pressure-volume reference under its acquisition conditions. The abstract reports favorable agreement but reserves clinical validation.<Estimation of left ventricular compliance using on-line echocardiographic automated border detection and pressure data by John Gorcsan III and others>[Abstract, comparison and clinical-validation limitation]{ref} That evidence documents Kawai's participation in a specific physiological measurement problem without guessing a separate personal task, date of birth or broader biography.
Back to article page
