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Methods for quantifying the risk of cardiac death using exercise induced heart rate variability metrics

A technology of heart rate variability and exercise, applied in applications, electrocardiography, bioelectrical signal measurement, etc., can solve problems such as inability to provide accurate and low-cost screening tools

Inactive Publication Date: 2009-04-29
CARDIAC SCIENCE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, existing methods and devices to quantify SCD risk based on HRV do not provide an accurate and low-cost screening tool for high-volume screening

Method used

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  • Methods for quantifying the risk of cardiac death using exercise induced heart rate variability metrics
  • Methods for quantifying the risk of cardiac death using exercise induced heart rate variability metrics
  • Methods for quantifying the risk of cardiac death using exercise induced heart rate variability metrics

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Embodiment Construction

[0027] The following discussion is provided to enable those skilled in the art to practice the invention. Various modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention as defined by the appended claims. Thus, the present invention is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features disclosed herein.

[0028] a. overview

[0029] figure 1 is a flowchart of a method 100 of quantifying cardiovascular mortality risk using an exercise-induced heart rate variability metric. The method 100 includes a stage 102 comprising increasing the patient's heart rate. This can be done through both exercise and pharmacological regimens. Method 100 continues to stage 104 comprising digitizing and recording an electrocardiogram ...

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Abstract

Methods and apparatus for assessing cardiac risks in a specific patient. One embodiment of a method in accordance with the invention comprises providing heart rate activity of a specific patient including a windowed time series relating to heart rate variability during a heart rate test. This method further includes determining a frequency domain value based on energy values of frequency bands of the heart rate variability in the windowed time series, and / or determining an aggregate power for a frequency band of the windowed time series. This method further includes assessing the risk of a cardiac event based on the frequency value and / or the aggregate power.

Description

[0001] Related Application Cross-References [0002] This application claims priority to US Provisional Patent Application Serial No. 60 / 779,313, filed March 3, 2006, which is incorporated herein by reference. technical field [0003] The present invention relates to methods and devices for assessing the risk of death from cardiovascular causes using spectral and temporal signatures of heart rate variability from heart rate measurements performed during a cardiac stress test. Background technique [0004] Sudden cardiac death (SCD) is the cause of approximately 300,000-400,000 deaths per year in the United States. Although the individual risk of SCD in the US adult population is only about 0.1-0.2% / year when applied to a large population base, SCD is often the first and only manifestation of the presence of cardiovascular disease in most cardiovascular-related deaths. Deaths related to recovery from a massive myocardial infarction actually account for only a minority of to...

Claims

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Application Information

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IPC IPC(8): A61B5/04A61B5/308A61B5/352A61B5/364
CPCA61B5/4884A61B5/0452A61B5/0428A61B5/0456A61B5/02405A61B5/0468A61B5/30A61B5/349A61B5/352A61B5/364A61B5/308
Inventor 戴维·米尔顿·哈德利
Owner CARDIAC SCIENCE CORP
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