EP0347708A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hemodynamic tachyarrhythmia detection
Assignee: Cardiac Pacemakers Inc
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Filing: 1989-06-12
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Granted: —
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Expires: 2009-06-12
Abstract
Abstract A method is disclosed for measuring normal heart function over a predetermined time threshold. These measurements are compared to measured RV end diastolic pressure/volume, right atrial filling pressure, right atrial peak volume, and/or mean right ventricular or right atrial pressure/volume which, if exceeding the normal heart measurements for a predetermined time threshold (18,28) is indicative of abnormal heart function (20,30). This indication taken alone or in combination with a predetermined heart rate in excess of a normal heart rate for a predetermined time, results in application of a defibrillating shock (36) to the heart of the patient. RV and diastolic pressure/volume, right atrial filling pressure, right atrial peak volume, and/or mean right ventricular or right atrial pressure/volume are the most consistent and instantaneous reflections of abnormal heart conditions which trace systemic pressure/flow.
Inventors
- 👤 J. Edward Shapland
- 👤 Rodney W. Salo
- 👤 William C. Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:07
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/02028; A61B5/021; A61B5/024; A61B5/0245; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring mean right heart pressure over a predetermined time period, and comparing the measured mean right heart pressure against subsequently measured mean right heart pressure for a subsequent predetermined time period and when the subsequently measured mean right heart pressure exceeds said first measured mean right heart pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 2
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring mean right heart pressure over a predetermined time period, and comparing the measured mean right heart pressure against subsequently measured mean right heart pressure for a subsequent predetermined time period and when the subsequently measured mean right heart pressure exceeds said first measured mean right heart pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 3
Dependent Claim
71 words
The method of claim 1, wherein said measuring of mean right heart pressure is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured mean right heart pressure exceeds said first measured mean right heart pressure, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 4
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring mean right heart volume over a predetermined time period, and comparing the measured mean right heart volume against subsequently measured mean right heart volume for a subsequent predetermined time period and when the subsequently measured mean right heart volume exceeds said first measured mean right heart volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 5
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring mean right heart volume over a predetermined time period, and comparing the measured mean right heart volume against subsequently measured mean right heart volume for a subsequent predetermined time period and when the subsequently measured mean right heart volume exceeds said first measured mean right heart volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 6
Dependent Claim
71 words
The method of claim 3, wherein said measuring of mean right heart volume is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured mean right heart volume exceeds said first measured mean right heart volume, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 7
Independent Claim
95 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right ventricular end diastolic pressure over a predetermined time period, and comparing the measured right heart end diastolic pressure against subsequently measured right heart end diastolic pressure for a subsequent predetermined time period and when the subsequently measured right heart end diastolic pressure exceeds said first measured right heart end diastolic pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 8
Independent Claim
95 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right ventricular end diastolic pressure over a predetermined time period, and comparing the measured right heart end diastolic pressure against subsequently measured right heart end diastolic pressure for a subsequent predetermined time period and when the subsequently measured right heart end diastolic pressure exceeds said first measured right heart end diastolic pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 9
Dependent Claim
73 words
The method of claim 5, wherein said measuring of right ventricular end diastolic pressure is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured right ventricular diastolic pressure exceeds said first measured right ventricular end diastolic pressure, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 10
Independent Claim
95 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right ventricular end diastolic volume over a predetermined time period, and comparing the measured right heart end diastolic volume against subsequently measured right heart end diastolic volume for a subsequent predetermined time period and when the subsequently measured right heart end diastolic volume exceeds said first measured right heart end diastolic volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 11
Independent Claim
95 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right ventricular end diastolic volume over a predetermined time period, and comparing the measured right heart end diastolic volume against subsequently measured right heart end diastolic volume for a subsequent predetermined time period and when the subsequently measured right heart end diastolic volume exceeds said first measured right heart end diastolic volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 12
Dependent Claim
74 words
The method of claim 7, wherein said measuring of right ventricular end diastolic volume is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured right ventricular end diastolic volume exceeds said first measured right ventricular end diastolic volume, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 13
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right atrial filling pressure over a predetermined time period, and comparing the measured right atrial filling pressure against subsequently measured right atrial filling pressure for a subsequent predetermined time period and when the subsequently measured right atrial filling pressure exceeds said first measured right atrial filling pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 14
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right atrial filling pressure over a predetermined time period, and comparing the measured right atrial filling pressure against subsequently measured right atrial filling pressure for a subsequent predetermined time period and when the subsequently measured right atrial filling pressure exceeds said first measured right atrial filling pressure by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 15
Dependent Claim
71 words
The method of claim 9, wherein said measuring of right atrial filling pressure is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured right atrial filling pressure exceeds said first measured right atrial filling pressure, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 16
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right atrial peak volume over a predetermined time period, and comparing the measured right atrial peak volume against subsequently measured right atrial peak volume for a subsequent predetermined time period and when the subsequently measured right atrial peak volume exceeds said first measured right atrial peak volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 17
Independent Claim
90 words
A method of electronically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function such as life-threatening arrhythmias, said method comprising: measuring right atrial peak volume over a predetermined time period, and comparing the measured right atrial peak volume against subsequently measured right atrial peak volume for a subsequent predetermined time period and when the subsequently measured right atrial peak volume exceeds said first measured right atrial peak volume by a predetermined threshold, an electrical signal is generated representative of an abnormal functioning of the heart.
Claim 18
Dependent Claim
71 words
The method of claim 11, wherein said measuring of right atrial peak volume is performed simultaneously with measuring of current heart rate so that when the measured current heart rate exceeds a predetermined baseline heart rate for a predetermined time period and said subsequently measured right atrial peak volume exceeds said first measured right atrial peak volume, said electrical signal triggers a mechanism to deliver a defibrillating shock to the heart.
Claim 19
Independent Claim
126 words
A method of electrically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function, said method comprising: sensing at least one cardiac parameter and transmitting said at least one cardiac parameter to an implanted automatic implantable cardioverter/defibrillator (AICD), simultaneously detecting a heart rate of the heart, comparing the detected heart rate against a predetermined threshold and, when the detected heart rate exceeds said predetermined threshold, comparing the transmitted electrical signals against a second predetermined threshold, and generating and delivering a high energy defibrillating shock to the heart from the AICD when said sensed cardiac parameters exceed said second predetermined threshold and providing a different course of treatment to the heart when said sensed cardiac parameters are less than said second predetermined threshold.
Claim 20
Independent Claim
126 words
A method of electrically monitoring the operation of a heart for immediate detection of abnormalities in cardiac function, said method comprising: sensing at least one cardiac parameter and transmitting said at least one cardiac parameter to an implanted automatic implantable cardioverter/defibrillator (AICD), simultaneously detecting a heart rate of the heart, comparing the detected heart rate against a predetermined threshold and, when the detected heart rate exceeds said predetermined threshold, comparing the transmitted electrical signals against a second predetermined threshold, and generating and delivering a high energy defibrillating shock to the heart from the AICD when said sensed cardiac parameters exceed said second predetermined threshold and providing a different course of treatment to the heart when said sensed cardiac parameters are less than said second predetermined threshold.
Claim 21
Dependent Claim
16 words
The method of claim 13, wherein said at least one parameter is mean right heart pressure.
Claim 22
Dependent Claim
17 words
The method of claim 13, wherein said at least one parameter is right heart end diastolic pressure.
Claim 23
Dependent Claim
19 words
The method of claim 14, wherein another of said at least one parameter is right heart end diastolic pressure.
Claim 24
Dependent Claim
16 words
The method of claim 13, wherein said at least one parameter is mean right heart volume.
Claim 25
Dependent Claim
17 words
The method of claim 13, wherein said at least one parameter is right heart end diastolic volume.
References Cited (Backward Citations)
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