Apparatus for predicting heart failure

Abstract

Devices and methods for detecting heart failure (HF) events or identifying a patient at an elevated risk of developing future HF events, such as events indicative of HF decompensation status, are described. The devices and methods can detect an HF event or predict an HF risk using signal transformations on different portions of a physiologic signal. A system can comprise a physiologic signal analyzer circuit that can generate a signal trend of a signal feature calculated using one or more physiologic signals obtained from a patient. A signal transformation circuit can dynamically generate first and second transformations, apply the transformations to respective first and second portions of the signal trend, and generate respectively first and second transformed signal trends. A target physiologic event detector circuit can detect a target physiologic event such as an event of worsening HF using a comparison of the first and second transformed signal trends.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority under 35 U.S.C § 119(e) of U.S. Provisional Patent Application Serial No. 61 / 912,588, filed December 6, 2013, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to medical devices and, more particularly, to systems, devices and methods for detecting and monitoring heart failure decompensation. Background technique [0004] Congestive heart failure (CHF) is a major health problem and affects more than five million people in the United States alone. CHF is the loss of the heart's pumping energy, resulting in an inability to deliver enough blood to meet the demands of surrounding tissues. CHF patients typically have an enlarged heart due to weakened heart muscle, resulting in reduced contractility and poor blood output from the heart. [0005] CHF is usually a chronic state, but can occur suddenly. It can affe...

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Problems solved by technology

Asynchronous contraction of the left and right ventricles also reduces the pumping efficiency of the heart

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