Brian J. Wenzel,Dan E. Gutfinger,Mihir Naware,Xiaoyi Min,Jeffery Siou,Anders Bjorling,Dorin Panescu
申请号：
US13943680
公开号：
US20150025397A1
申请日:
2013.07.16
申请国别(地区):
US
年份:
2015
代理人:
摘要：
Techniques are provided for estimating left atrial pressure (LAP) or other cardiac performance parameters based on measured conduction delays. In particular, LAP is estimated based interventricular conduction delays. Predetermined conversion factors stored within the device are used to convert the various the conduction delays into LAP values or other appropriate cardiac performance parameters. The conversion factors may be, for example, slope and baseline values derived during an initial calibration procedure performed by an external system, such as an external programmer. In some examples, the slope and baseline values may be periodically re-calibrated by the implantable device itself. Techniques are also described for adaptively adjusting pacing parameters based on estimated LAP or other cardiac performance parameters. Still further, techniques are described for estimating conduction delays based on impedance or admittance values and for tracking heart failure therefrom.
