IP Library Granted Patent US 7,890,161
Granted Patent B2
US 7,890,161 · App. 11/933,795 · Granted Feb 15, 2011

Method for detecting the myocardial state of the heart and a measuring apparatus for performing this method

Assignee: Biotronik CRM Patent AG
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Quick Facts
Patent No.
US 7,890,161
App. No.
11/933,795
Granted
Feb 15, 2011
Kind
B2
Abstract

A method for detecting the myocardial state of a heart with a measuring apparatus which includes inserting a bipolar cardiological measuring electrode ( 4 ) into a heart division ( 8 ) at an acute attachment angle ( 9 ) on the myocardium ( 6 ) of less than 90°, measuring a cardiological stimulation signal such as an IEGM in sequential cardiac cycles, and in addition, determining the positive and negative maximum amplitudes V p and V n of the IEGM, ascertaining an asymmetry factor η of the stimulation signal (IEGM) of sequential cardiac cycles according to the equation η=(V p −|V n |)/(V p +|V n |) and storing the asymmetry factor η of sequential cardiac cycles for analysis.

Claims (41)

1. A method for detecting the myocardial state of a heart comprising:

inserting a bipolar cardiological measuring electrode into a heart division and anchoring a tip of the electrode in a myocardium of the heart at an attachment angle of less than 90°, relative to a myocardial surface;

measuring a signal of sequential cardiac cycles via intracardiac electrogram to collect measured signals with an implantable processing apparatus;

determining positive and negative maximum amplitudes V p and V n of said signal of sequential cardiac cycles;

ascertaining an asymmetry factor η of said signal of sequential cardiac cycles according to η=(V p −|V n |)/(V p +|V n |); and

storing said asymmetry factor η of sequential cardiac cycles for analysis.

2. The method according to claim 1 further comprising:

determining the positive and negative maximum amplitudes V p and V n of said signal of sequential cardiac cycles with said implantable processing apparatus;

ascertaining the asymmetry factor η of said signal of sequential cardiac cycles according to equation η=(V p −|V n |)/(V p +|V n |) with said implantable processing apparatus; and

storing the asymmetry factor η of sequential cardiac cycles for analysis with said implantable processing apparatus.

3. The method according to claim 1 further comprising:

transmitting the measured signals to an external analysis station via a transmitter coupled with said implantable processing apparatus;

determining the positive and negative maximum amplitudes V p and V n of said signal of sequential cardiac cycles with said external analysis station;

ascertaining the asymmetry factor η of said signal of sequential cardiac cycles according to equation η=(V p −|V n |)/(V p +|V n |) with said external analysis station; and

storing the asymmetry factor η of sequential cardiac cycles for analysis with said external analysis station.

4. The method according to claim 1 wherein said anchoring comprises anchoring said bipolar cardiological measuring electrode at an attachment angle of approximately 45°.

5. The method according to claim 1 further comprising inserting said bipolar cardiological measuring electrode into a ventricle of said heart and measuring an R wave of said intracardial electrogram with said bipolar cardiological measuring electrode.

6. The method according to claim 1 further comprising inserting said bipolar cardiological measuring electrode into an atrium of said heart and measuring a P wave of said intracardial electrogram with said bipolar cardiological measuring electrode.

7. A measuring apparatus for detecting the myocardial state of a heart comprising:

a bipolar cardiological measuring electrode configured to insert into a heart division and configured to anchor a tip of the electrode in a myocardium of the heart at an attachment angle of less than 90°, relative to a myocardial surface;

an implantable processing apparatus configured to measure a signal of sequential cardiac cycles via intracardiac electrogram to collect measured signals;

wherein the implantable processing apparatus is configured to:

determine positive and negative maximum amplitudes V p and V n of said signal of sequential cardiac cycles;

ascertain an asymmetry factor η of said signal of sequential cardiac cycles according to equation η=V p −|V n |)(V p +|V n |); and

store said asymmetry factor n of sequential cardiac cycles for analysis.

8. The apparatus according to claim 7 wherein said attachment angle is approximately 45°.

9. The apparatus according to claim 7 wherein said bipolar cardiological measuring electrode is in a ventricle of said heart and wherein an R wave of said intracardial electrogram is measured with said measuring electrode.

10. The apparatus according to claim 7 wherein said bipolar cardiological measuring electrode is in an atrium of said heart and wherein a P wave of said intracardial electrogram is measured with said measuring electrode.

11. A measuring apparatus for detecting the myocardial state of a heart comprising:

a bipolar cardiological measuring electrode configured to insert into a heart division and configured to anchor a tip of the electrode in a myocardium of the heart at an attachment angle of less than 90° relative to a myocardial surface;

an implantable processing apparatus configured to measure a signal of sequential cardiac cycles via intracardiac electrogram to collect measured signals;

a transmitter coupled with said implantable processing apparatus;

an external analysis station;

wherein said transmitter is configured to transmit said measured signals to said external analysis station;

wherein the external analysis station is configured to:

determine positive and negative maximum amplitudes V p and V n of said signal of sequential cardiac cycles;

ascertain an asymmetry factor η of said signal of sequential cardiac cycles according to equation η=(V p −|V n |)/(V p +|V n |) with said implantable processing apparatus; and

store said asymmetry factor η of sequential cardiac cycles for analysis.

12. The apparatus according to claim 11 wherein said attachment angle is approximately 45°.

13. The apparatus according to claim 11 wherein said bipolar cardiological measuring electrode is in a ventricle of said heart and wherein an R wave of said intracardial electrogram is measured with said measuring electrode.

14. The apparatus according to claim 11 wherein said bipolar cardiological measuring electrode is in an atrium of said heart and wherein a P wave of said intracardial electrogram is measured with said measuring electrode.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 23, 2018
From: BIOTRONIK CRM PATENT AG
To: BIOTRONIK SE & CO. KG
Reel/Frame 045995/0948 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 6, 2007
From: ANOSOV, OLEG; KHASSANOV, ILDAR
To: BIOTRONIK CRM PATENT AG
Reel/Frame 020080/0725 →
Priority Claims (1)
DE 10 2006 054 474 · Nov 18, 2006 · national
Continuity (1)
Related Publication 20080119746A1 · May 22, 2008