GB1410743A - Cardiac pacemaker monitoring system - Google Patents
Cardiac pacemaker monitoring systemInfo
- Publication number
- GB1410743A GB1410743A GB735173A GB735173A GB1410743A GB 1410743 A GB1410743 A GB 1410743A GB 735173 A GB735173 A GB 735173A GB 735173 A GB735173 A GB 735173A GB 1410743 A GB1410743 A GB 1410743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- atrial
- ventricular
- pacer
- qrs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000747 cardiac effect Effects 0.000 title abstract 3
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 102100026827 Protein associated with UVRAG as autophagy enhancer Human genes 0.000 abstract 10
- 101710102978 Protein associated with UVRAG as autophagy enhancer Proteins 0.000 abstract 10
- 230000002861 ventricular Effects 0.000 abstract 7
- 230000001746 atrial effect Effects 0.000 abstract 6
- 230000003111 delayed effect Effects 0.000 abstract 2
- 230000002269 spontaneous effect Effects 0.000 abstract 2
- 101000653791 Bos taurus Protein S100-A12 Proteins 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
- A61N1/368—Heart stimulators controlled by a physiological parameter, e.g. heart potential comprising more than one electrode co-operating with different heart regions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/37—Monitoring; Protecting
- A61N1/371—Capture, i.e. successful stimulation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7217—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise originating from a therapeutic or surgical apparatus, e.g. from a pacemaker
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/37—Monitoring; Protecting
- A61N1/371—Capture, i.e. successful stimulation
- A61N1/3712—Auto-capture, i.e. automatic adjustment of the stimulation threshold
- A61N1/3714—Atrial capture
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Physiology (AREA)
- Electrotherapy Devices (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
1410743 Electro-medical apparatus F HOFFMANN-LA ROCHE & CO AG 14 Feb 1973 [25 Feb 1972 (2)] 7351/73 Heading G1N In a cardiac pacemaker monitoring system, ECG and pacemaker spike signals are derived from a pacemaker carrying patient 21, a QRS pulse is derived from the ECG signal in each cardiac cycle, a predetermined time interval is established from the onset of a pacemaker spike, and an indicator 38 is operated, to denote occurrence of a capture event (i.e. production of a QRS pulse by a pacemaker spike), by a pulse produced if the QRS pulse occurs within the predetermined time interval. A second indicator 37 is also provided to indicate non-capture events. As shown, ECG signals from pick-up electrodes 11 are applied to a QRS detector 23 and a pacemaker spike detector 27. Timing logic 24 receives the QRS pulse from detector 23 and provides a plurality of timing signals D1, D2, P and C, Figs. 2 and 3 (not shown). A spontaneous heartbeat detector 25 provides an output to an indicator 26 upon occurrence of spontaneous QRS pulses, inputs A and G inhibiting detector 25 upon occurrence of capture events. The pacemaker spike detector 27, Figs. 4-7 (not shown), processes the ECG signals to provide spike signals which are applied to a threshold detector, the threshold of which is derived from an integrator which also receives the spike signals. The threshold detector provides a pulse for each spike which exceeds the threshold, these pulses being applied to a pulse width discriminator circuit and a pulse rate discriminate circuit to provide normalized pulses representing pacemaker spike signals. The system may be used to monitor fixed rate and demand ventricular pacers, fixed rate and demand atrial pacers, and fixed rate and demand atrial-ventricular pacers. Switches throughout the system are set for the appropriate type of pacer, Fig. 8 (not shown). Pulses from detector 27 are applied via a toggle switch, a NAND gate 29 and a repetition rate discriminator 32 or toggle switch 28, a NAND gate 31 and a repetition rate discriminator 33 depending on whether they are ventricular pacer pulses or atrial pacer pulses respectively. Three channels are provided, a ventricular pacing channel 34, Fig. 9 (not shown), an atrial-ventricular pacing channel 35, Fig. 11 (not shown), and an atrial pacing channel 36, Fig. 12 (not shown). For ventricular pacing, a capture event is indicated at 38 if a QRS pulse falls within 0-300 ms of a ventricular pacer pulse by delaying the pacer pulse by 300 ms and detecting if a pulse D1 of 300 ms from the logic 24 occurs simultaneously with the delayed pulse. Non-simultaneous occurrence causes a pulse to be applied to non-capture indicator 37 and to an alarm indicator 39 via logic 41. For atrial pacing, a capture event is indicated at 38 if a QRS pulse falls within 120-275 ms of an atrial pacer pulse by delaying the pacer pulse by 275 ms and detecting if the delayed pulse and a pulse D2 of 155 ms from logic 24 occur simultaneous. Non simultaneous occurrence again causes a pulse to be applied to indicator 37 and indicator 39 via logic 41. For atrial-ventricular pacing, an atrial-ventricular capture event is indicated at 38 if a ventricular pacer pulse occurs within 120-250 ms of an atrial pacer pulse in similar manner to above. Capture of a QRS pulse by the ventricular pacer pulse is also indicated in channel 34. The alarm indicator is energized by logic 41, Figs. 14 and 15 (not shown), only if three non- capture events are detected within any period of 6 seconds.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22942272A | 1972-02-25 | 1972-02-25 | |
US22949572A | 1972-02-25 | 1972-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1410743A true GB1410743A (en) | 1975-10-22 |
Family
ID=26923283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB735173A Expired GB1410743A (en) | 1972-02-25 | 1973-02-14 | Cardiac pacemaker monitoring system |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5638217B2 (en) |
CH (1) | CH553416A (en) |
DE (1) | DE2309173A1 (en) |
GB (1) | GB1410743A (en) |
NL (1) | NL7302564A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2406987A1 (en) * | 1977-10-25 | 1979-05-25 | Ivac Corp | PERFECTION WITH AN ELECTRONIC SPHYGMOMANOMETER |
GB2461166A (en) * | 2008-06-23 | 2009-12-30 | Gen Electric | Detecting and diagnosing pacemaker malfunctions using a combined biopotential and pacing signal |
EP2478932A3 (en) * | 2010-12-20 | 2013-04-24 | BIOTRONIK SE & Co. KG | Implantable device |
-
1973
- 1973-02-14 GB GB735173A patent/GB1410743A/en not_active Expired
- 1973-02-15 CH CH217173A patent/CH553416A/en not_active IP Right Cessation
- 1973-02-23 NL NL7302564A patent/NL7302564A/xx unknown
- 1973-02-23 DE DE19732309173 patent/DE2309173A1/en active Pending
- 1973-02-26 JP JP2302973A patent/JPS5638217B2/ja not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2406987A1 (en) * | 1977-10-25 | 1979-05-25 | Ivac Corp | PERFECTION WITH AN ELECTRONIC SPHYGMOMANOMETER |
GB2461166A (en) * | 2008-06-23 | 2009-12-30 | Gen Electric | Detecting and diagnosing pacemaker malfunctions using a combined biopotential and pacing signal |
GB2461166B (en) * | 2008-06-23 | 2012-04-11 | Gen Electric | A system and method of detecting and diagnosing pacing system malfunctions |
EP2478932A3 (en) * | 2010-12-20 | 2013-04-24 | BIOTRONIK SE & Co. KG | Implantable device |
US9079038B2 (en) | 2010-12-20 | 2015-07-14 | Biotronik Se & Co. Kg | Implantable device with elongated electrical conductor |
Also Published As
Publication number | Publication date |
---|---|
DE2309173A1 (en) | 1973-08-30 |
JPS5638217B2 (en) | 1981-09-04 |
NL7302564A (en) | 1973-08-28 |
CH553416A (en) | 1974-08-30 |
JPS4912677A (en) | 1974-02-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |