Accelerometer-based monitoring of the frequency dynamics of the isovolumic contraction phase and pathologic cardiac vibrations
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
a technology of isovolumic contraction and accelerometer, which is applied in the field of accelerometer-based monitoring of the frequency dynamics of the isovolumic contraction phase and the pathologic cardiac vibration, can solve the problems of reducing the sensitivity of acceleration signal measurement and the interpretation of this measuremen
Inactive Publication Date: 2009-12-10
DOBAK III JOHN D
View PDF42 Cites 31 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Benefits of technology
[0007]Monitoring changes in the frequency of the vibrational component of the ICP may be more practical and accurate than measuring amplitude changes for assessing cardiac function. Similarly, monitoring the time interval of this phase may prove more practical and accurate. Such an approach would reduce the sensitivity of the acceleration signal measurement and the interpretation of this measurement to the effects of gravity, sensor axis orientation, relative motion of the sensing device to which the sensor is affixed, and translational motion of the heart.
Problems solved by technology
Such an approach would reduce the sensitivity of the acceleration signal measurement and the interpretation of this measurement to the effects of gravity, sensor axis orientation, relative motion of the sensing device to which the sensor is affixed, and translational motion of the heart.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018]A graph of the cardiac filling and pumping cycle and valvular events is shown in FIG. 1. The cardiac LV pumping cycle (LV cycle) is divided into two periods: diastole and systole. Diastole is the filling period and systole is the ejection period. Five different phases of the LV cycle can be identified within the systolic and diastolic periods: isovolumic contraction 56, ejection 58, isovolumic relaxation 62, early diastolic filling (rapid filling) 64, and late diastolic filling (atrial contraction) 66. Mitral valve closure 68 (“MVC”) occurs during isovolumic contraction and aortic valve closure 72 (“AVC”) occurs during isovolumic relaxation. Also shown in the figures are the left ventricular pressure LV Press 74, a regular electrocardiogram ECG 76, the left ventricular end-diastolic volume LVEDV 78, the left ventricular end-systolic volume LVESV 82, a graph depicting heart sounds 84, the left atrial pressure LA Press 86, the aortic pressure 88, a-wave 92, c-wave 94, and v-wave...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
Methods and systems are disclosed that characterize cardiac function using an acceleration sensor to acquire and analyze the frequency dynamics associated with the isovolumic contraction phase (“ICP”). This information can be used to characterize heart function; optimize therapy for cardiomyopathy, including CRT therapy (including pacing intervals and required pharmacologic therapy); and to optimize CCM therapy. In addition, this information can be used to identify target pacing regions for CRT lead placement. Further, analyzing the frequency dynamics can be used to characterize pathologic heart vibrational motion, such as mitral regurgitation and the third or fourth heart sound, and the response of this motion to therapy for cardiomyopathy.
Description
STATEMENT OF RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 11 / 347,623, filed Feb. 3, 2006, entitled “Accelerometer-Based Monitoring Of The Frequency Dynamics Of The Isovolumic Contraction Phase And Pathologic Cardiac Vibrations,” which claims the benefit of U.S. Provisional Application No. 60 / 650,532, filed Feb. 7, 2005, U.S. Provisional Application No. 60 / 655,038, filed Feb. 22, 2005, U.S. Provisional Application No. 60 / 656,307, filed Feb. 25, 2005, U.S. Provisional Application No. 60 / 657,766, filed Mar. 1, 2005, U.S. Provisional Application No. 60 / 659,658, filed Mar. 8, 2005, U.S. Provisional Application No. 60 / 663,788, filed Mar. 21, 2005, U.S. Provisional Application No. 60 / 669,324, filed Apr. 7, 2005, U.S. Provisional Application No. 60 / 677,569, filed May 4, 2005 and U.S. Provisional Application No. 60 / 680,673, filed May 13, 2005. Each of the prior US Provisional Patent Applications is incorporated by reference in its entirety ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more
Patent Type & Authority Applications(United States)
Login to view more 
Login to view more