Method and system for characterizing cardiac function based on dynamic impedance

A system for characterizing cardiac function, comprising:

• inputs configured to collect cardiac signals associated with electrical or mechanical behavior of a heart over at least one cardiac cycle (CC);
• a CS module configured to identify a timing feature of interest (FOI) from the cardiac signals;
• a DI module configured to collect dynamic impedance (DI) data over at least one cardiac cycle (CC), designated by the timing FOI, along at least one of i) a venous return (VR) vector or ii) a right ventricular function (RVF) vector;
• and
• a morphology characteristic (MC) module configured to analyze at least one morphologic characteristic from the DI data based on at least one of i) a VR-DI correlation metric to obtain a VR indicator associated with the CC or ii) a RVF-DI correlation metric to obtain a RVF indicator associated with CC.