Cardiac rhythm management system for edema

• US 20080215108A1
• Filed: 05/12/2008
• Published: 09/04/2008
• Est. Priority Date: 07/31/2001
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Spinelli, Julio C., Zhu, Qingsheng
• Granted Patent: US 9,265,950 B2
• Time in Patent Office: Days
• US Class Current: 607/17
• CPC Class Codes: A61N 1/3627 for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy
• CPC Class Codes: A61N 1/36521 the parameter being derived from measurement of an electrical impedance
• CPC Class Codes: A61N 1/3684 for stimulating the heart at multiple sites of the ventricle or the atrium
• CPC Class Codes: A61N 1/36842 Multi-site stimulation in the same chamber
• CPC Class Codes: A61N 1/36843 Bi-ventricular stimulation

Abstract

A cardiac rhythm management system detects edema. In response to an episode of detected edema, it initiates or adjusts a cardiac resynchronization therapy and/or a cardiac contractility modulation (CCM) therapy.

Claims

1. An implantable medical device, comprising:

a plurality of electrodes configured to electrically couple to a patient'"'"'s heart;

an impedance measurement circuit coupled to at least some of the electrodes and configured to measure transthoracic impedance; and

a processor configured to output a first transthoracic impedance signal and a second transthoracic impedance signal, wherein the first transthoracic impedance signal is long-term relative to the second transthoracic impedance signal.