Logistic-Based Systolic Model (LBSM)

A logistic-based systolic model with a right-ventricular exponential amplifier produces physiologically skewed pulmonary velocity and pressure waveforms consistent with echocardiographic and catheter observations. This unified formulation, developed for applications in pulmonary hypertension, relates pulmonary blood-flow velocity and pressure through a hemodynamic mechanism that links pulmonary acceleration time (PAcT) to systolic pulmonary artery pressure (PAP), yielding a logistic-based PAP estimator that extends earlier linear and logarithmic approaches.