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US 2011/0237968 A1Published application
METHOD, IMPLANTABLE MEDICAL DEVICE, AND SYSTEM FOR DETERMINING THE CONDITION OF A HEART VALVE (As Amended)
AssigneeSt. Jude Medical, Inc.
InventorsAndreas Blomqvist, Karin Järverud
Life of this patent
Estimating the term…
Abstract
An implantable medical device has an impedance processor that determines impedance data reflective of the transvalvular impedance of a heart valve of a heart during a heart cycle. The determined impedance data are processed by a representation processor that estimates diastolic and systolic transvalvular impedance representations. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of the heart valve based on the estimated diastolic and systolic transvalvular impedance representations.
Claims21
An implantable medical device comprising:
- an electrode connecting arrangement (110) connectable to multiple electrodes of which at least one is being arranged on a cardiac lead connectable to said electrode connecting arrangement;
- a signal generator that generates an electric signal applicable over a portion of a heart by a pair of electrodes among said multiple electrodes;
- an impedance processor that determines, based on said electric signal and a resulting electric signal measured over a portion of said heart by a pair of electrodes of said multiple electrodes, impedance data reflective of a transvalvular impedance of a valve of said heart during at least one heart cycle;
- a representation processor that estimates a diastolic transvalvular impedance representation and a systolic transvalvular impedance representation based on said impedance data;
- and
- a condition processor that determines a condition of said valve based on said diastolic transvalvular impedance representation and said systolic transvalvular impedance representation.
3 more elements
A method of determining a condition of a valve of a heart in a subject, said method comprising:
- applying an electric signal over a portion of said heart (10) during at least one heart cycle;
- in computerized processing circuitry, determining, based on said electric signal and a resulting electric signal measured over said portion of said heart, impedance data reflective of a transvalvular impedance of said valve during said at least one heart cycle;
- in computerized processing circuitry, estimating a diastolic transvalvular impedance representation and a systolic transvalvular impedance representation based on said impedance data
- in computerized processing circuitry, determining said condition of said valve based on said diastolic transvalvular impedance representation and said systolic transvalvular impedance representation, and emitting, in electronic form, an indication of said condition of said valve from said computerized processing circuitry.
1 more element
A system comprising:
- an implantable medical device;
- a non-implantable communication and processing device comprising:
- a receiver that wirelessly receives data transmitted by said implantable medical device;
- said implantable medical device comprising:
- an electrode connecting arrangement connectable to multiple electrodes of which at least one is being arranged on a cardiac lead connectable to said electrode connecting arrangement;
- a signal generator for generating an electric signal applicable over a portion of a heart by a pair of electrodes of said multiple electrodes;
- and
- a transmitter that wirelessly transmits data to said non-implantable communication and processing device;
- an impedance processor that determines, based on said electric signal and a resulting electric signal measured over a portion of said heart by a pair of electrodes among said multiple electrodes, impedance data reflective of a transvalvular impedance of a valve of said heart during at least one heart cycle;
- a representation processor that estimates a diastolic transvalvular impedance representation and a systolic transvalvular impedance representation based on said impedance data;
- and
- a condition processor that determines a condition of said valve based on said diastolic transvalvular impedance representation and said systolic transvalvular impedance representation.
9 more elements
Dependencies are inferred from the claim text.