Title:
CARDIAC STIMULATION DEVICES AND METHODS FOR MEASURING IMPEDANCES ASSOCIATED WITH THE LEFT SIDE OF THE HEART
Document Type and Number:
WIPO Patent Application WO2001087410
Kind Code:
A3
Abstract:
Methods of and systems for measuring at least one physiological parameter for assessing a patient's cardiac condition based on left heart impedance measurements are described. Various embodiments establish a current flow through a left side of the heart and measure a voltage between a first location on or in the left side of the heart and a second location within the human body while establishing the current flow. The inventive techniques and systems can be used for, among other things, measuring progression or regression of myocardial failure, dilation, or hypertrophy, pulmonary congestion, myocardial contractility, or ejection fraction. The measured voltage, related to left heart impedance, can be used to monitor patient condition for diagnostic purposes or to adapt pacing or defibrillation therapy. Therapy adaptation can include controlling pacing modes, pacing rates, or interchamber pacing delays, for example.
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Inventors:
BRADLEY KERRY
BORNZIN GENE A
PARK EULJOON
KROLL MARK W
BORNZIN GENE A
PARK EULJOON
KROLL MARK W
Application Number:
PCT/US2001/015520
Publication Date:
March 21, 2002
Filing Date:
May 14, 2001
Export Citation:
Assignee:
PACESETTER INC (US)
International Classes:
A61N1/365; (IPC1-7): A61N1/365
Domestic Patent References:
| WO1999030777A1 | 1999-06-24 | |||
| WO2000078391A1 | 2000-12-28 |
Foreign References:
| EP0990451A2 | 2000-04-05 | |||
| US4674518A | 1987-06-23 | |||
| US5501702A | 1996-03-26 |
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