Patent ID: 9198614
Filing Date: 2015-12-01
Classification: A61B,A61N

Abstract:
1. A method for characterizing cardiac function, the method comprising: collecting cardiac signals associated with asynchronous timing between first and second chambers of the heart using one or more sensors coupled to the heart; collecting dynamic impedance (DI) data along a chamber-specific function (CSF) vector to form a DI data set, the DI data set collected during a collection window that is temporally aligned based on a timing feature of interest (FOI); repeating the collection operations over multiple cardiac cycles (CC) to obtain an ensemble of DI data sets; and combining the ensemble of DI data sets to form a composite DI data set that is coupled to a chamber functional mechanic of interest (FMOI) associated with the first chamber and decoupled from functional mechanics associated with the second chamber; analyzing the composite DI data set to obtain a CSF indicator associated with the chamber FMOI of the first chamber; and adjusting an IMD therapy configuration based on at least one CSF indicator to encourage a select level for the chamber-specific function.