Monitoring and synchronizing ventricular contractions using an implantable stimulation device
First Claim
1. In an implantable cardiac stimulation device, a method comprising:
- collecting a plurality of right ventricle (RV) contraction parameters during at least one cardiac cycle;
collecting a plurality of left ventricle (LV) contraction parameters during said at least one cardiac cycle, without using a LV pressure sensor, wherein said plurality of LV contraction parameters includes a plurality of LV impedance values and collecting said plurality of LV contraction parameters includes measuring said plurality of LV impedance values using a first electrode having at least one electrical contact within the right ventricle, and a second electrode associated with said left ventricle, said second electrode having at least one electrical contact with cardiac tissue of said left ventricle, said first and second electrodes operatively arranged to pass an electrical signal on a path that includes blood within a chamber of the left ventricle; and
processing said RV contraction parameters as a function of said LV contraction parameters to produce data corresponding to an RV-LV contraction loop.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable cardiac stimulation device is configured to measure selected ventricular contraction parameters and apply stimulation therapy based on an analysis of the ventricular contraction parameters. The ventricular contraction parameters may include impedance values that correspond to the volume of fluid in the right ventricle and the left ventricle. The ventricular contraction parameters may include motion values that correspond to heart sounds/motion in the right ventricle and the left ventricle. The ventricular contraction parameters can be used to form a ventricular parameter loop associated with one or more cardiac cycles. The total area within the resulting loop should be maintained below a threshold value through the application of applicable stimulation therapy and/or further physician assistance.
-
Citations
32 Claims
-
1. In an implantable cardiac stimulation device, a method comprising:
-
collecting a plurality of right ventricle (RV) contraction parameters during at least one cardiac cycle; collecting a plurality of left ventricle (LV) contraction parameters during said at least one cardiac cycle, without using a LV pressure sensor, wherein said plurality of LV contraction parameters includes a plurality of LV impedance values and collecting said plurality of LV contraction parameters includes measuring said plurality of LV impedance values using a first electrode having at least one electrical contact within the right ventricle, and a second electrode associated with said left ventricle, said second electrode having at least one electrical contact with cardiac tissue of said left ventricle, said first and second electrodes operatively arranged to pass an electrical signal on a path that includes blood within a chamber of the left ventricle; and processing said RV contraction parameters as a function of said LV contraction parameters to produce data corresponding to an RV-LV contraction loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. An implantable cardiac stimulation device comprising:
-
means for collecting a plurality of right ventricle (RV) contraction parameters during at least one cardiac cycle; means for collecting a plurality of left ventricle (LV) contraction parameters during said at least one cardiac cycle, without using a LV pressure sensor, wherein said plurality of LV contraction parameters includes a plurality of LV impedance values and said means for collecting a plurality of LV contraction parameters includes a first electrode having at least one electrical contact within the right ventricle, and a second electrode associated with said left ventricle, said second electrode having at least one electrical contact with cardiac tissue of said left ventricle, said first and second electrodes operatively arranged to pass an electrical signal on a path that includes blood within a chamber of the left ventricle; and means for processing said RV contraction parameters as a function of said LV contraction parameters to produce data corresponding to an RV-LV contraction loop. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An implantable cardiac stimulation device comprising:
-
memory; input/output (I/O) circuitry configurable to make electrical contact with tissue within a patient and exchange information with at least one external device, said I/O circuitry including a first electrode having at least one electrical contact within the right ventricle, and a second electrode associated with said left ventricle, said second electrode having at least one electrical contact with cardiac tissue of said left ventricle, said first and second electrodes operatively arranged to pass an electrical signal on a path that includes blood within a chamber of the left ventricle; and logic operatively coupled to said memory and said I/O circuitry, said logic being configured to collect right ventricle (RV) contraction parameters and left ventricle (LV) contraction parameters from said I/O circuitry, process said RV contraction parameters as a function of said LV contraction parameters to produce data corresponding to an RV-LV contraction loop, and store at least a portion of said data corresponding to an RV-LV contraction loop in said memory, and wherein said RV and LV contraction parameters are collected during at least one cardiac cycle, said portion of said I/O circuitry does not include a lead within a chamber of the left ventricle, and said LV contraction parameters include a plurality of LV impedance values. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
-
Specification