CN109589498B - Cardiac pacing system - Google Patents
Cardiac pacing system Download PDFInfo
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- CN109589498B CN109589498B CN201811472114.0A CN201811472114A CN109589498B CN 109589498 B CN109589498 B CN 109589498B CN 201811472114 A CN201811472114 A CN 201811472114A CN 109589498 B CN109589498 B CN 109589498B
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- 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
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- 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
Abstract
The invention provides a heart pacing system, which comprises a sensing module and a control module; when the sensing module senses that an atrial event is absent between the current ventricular event and the previous ventricular event; alternatively, the AV interval is outside the first standard range; alternatively, the VV interval is less than the second standard interval; the control module determines that the current ventricular event is a ventricular premature event. In this way, the identification of ventricular premature events can be achieved systematically and in detail; and can provide detailed diagnostic information to help medical staff to better understand the condition of the patient and make reasonable treatment schemes. In addition, the heart pacing system provided by the invention can be used for evaluation, diagnosis, treatment and the like of various heart rhythms, and can enable equipment to be more flexible and simple to realize improvement and innovation of a treatment scheme.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a heart pacing system.
Background
The cardiac pacemaker (cardiac pacemaker) is an electronic therapeutic instrument implanted in the body, and delivers electric pulses supplied by a battery through a pulse generator, and stimulates cardiac muscle contacted by the electrode through conduction of a lead electrode, so that the heart is excited and contracted, and the purpose of treating cardiac dysfunction caused by certain arrhythmia is achieved.
The cardiac pacemaker may adjust its pacing delivery strategy based on sensed heart activity while recording heart activity status to provide physician diagnostic information. The correct perception and recognition of heart activity is therefore a vital function of pacemakers and a constantly increasing difficulty and focus.
Among them, a premature beat event is an important cardiac event, and a premature beat is a cardiac beat caused by a premature impulse emitted from an ectopic pacing point, and is the most common arrhythmia. Some premature beats are unaffected, and some premature beats may indicate a naturally occurring or underlying condition, and some premature beats may trigger other adverse arrhythmias, particularly after a pacemaker is implanted. For a pacemaker treatment device, since the premature beat is an abnormal rhythm, other bad rhythms can be caused, and other abnormal rhythms can be predicted, so that the occurrence of the premature beat has a certain influence on some detection of the pacemaker, and the implementation of a treatment or prevention function, for example, the premature beat can influence the detection of the self heart rate by the pacemaker, and for example, the occurrence of frequent PVC (premature ventricular contraction-premature ventricular contraction) can be an indication information of abnormal ventricular rhythms. When PVC occurs, the RR interval shortens, i.e., an electrical impulse is given in advance from any one of the ventricles or an ectopic rhythm point of the ventricular septum before the sinus node impulse has reached the ventricle, causing depolarization of the ventricle, called Premature Ventricular Contraction (PVC) for short. And is therefore critical for the perception and identification of premature events.
In current cardiac therapy devices, the detection chamber early can be determined by whether there is an atrial event prior to a ventricular event, and also by the stability of the RR interval. However, in these current cardiac treatment apparatuses, the method for identifying ventricular premature beat is generally single, and the ventricular premature beat event cannot be comprehensively identified, so that reliable basis cannot be provided for diagnosis and treatment of cardiac rhythm diseases possibly caused by the ventricular premature beat event.
Disclosure of Invention
The invention aims to provide a heart pacing system, which aims to solve the problems that the identification method for ventricular premature beat in the existing heart treatment equipment is single and does not have systemicity.
In order to solve the technical problems, the invention provides a heart pacing system, which comprises a control module and a sensing module connected with the control module;
the control module is configured to determine that the current ventricular event is an ventricular premature event based on one of:
case one: when the sensing module senses that an atrial event is absent between the current ventricular event and the previous ventricular event;
and a second case: when the sensing module senses that an atrial event exists between the current ventricular event and the previous ventricular event, and the AV interval between the atrial event and the current ventricular event is out of a first standard range;
and a third case: the cardiac pacing system is a dual-cavity pacing system, the sensing module senses that an atrial event exists between a current ventricular event and a previous ventricular event, and when the AV interval between the atrial event and the current ventricular event is within a first standard range, the sensing module senses that the VV interval between the current ventricular event and the previous ventricular event is smaller than a second standard interval; alternatively, the cardiac pacing system is a single-chamber pacing system, and the sensing module senses that a VV interval between a current ventricular event and a previous ventricular event is less than a second standard interval.
Optionally, the control module is configured to determine that the current ventricular event is a first type of ventricular premature event based on the condition one.
Optionally, the control module is configured to determine that the current ventricular event is a second type of ventricular premature event according to case two and when the AV interval is less than a first set value; the first set value is the lower limit value of the first standard range.
Optionally, the control module is configured to determine that the current ventricular event is a third type of ventricular premature event according to case two, and when the AV interval is greater than a second set value; the second set value is the upper limit value of the first standard range.
Optionally, the control module is configured to determine, according to case three, that the current ventricular event is a fourth type of ventricular premature event when the VV interval is less than a third standard interval; wherein the third standard interval is smaller than the second standard interval.
Optionally, the control module is configured to determine that the current ventricular event is a fifth type of ventricular premature event according to case three, and when the VV interval is not less than the third criterion interval.
Optionally, the second standard interval is a product of an average value of R VV intervals consecutive before the VV interval and a first coefficient M, where R is a natural number not less than 2 and M is a percentage.
Optionally, the third standard interval is a product of an average value of R VV intervals consecutive before the VV interval and a second coefficient N, where R is a natural number not less than 2 and N is a percentage.
Optionally, the cardiac pacing system further includes a pacing module, the pacing module being connected to the control module; the control module controls the pacing module to operate in a predetermined mode according to a judgment result of the current ventricular event.
Optionally, the control module marks the atrial event by a digital identifier for external output.
In summary, the cardiac pacing system provided by the present invention includes a sensing module and a control module; when the sensing module senses that an atrial event is absent from the current ventricular event and the previous ventricular event; alternatively, the AV interval is outside the first standard range; alternatively, the VV interval is less than the second standard interval; the control module determines that the current ventricular event is a ventricular premature event. Therefore, the heart pacing system provided by the invention can be used for identifying ventricular premature events in detail and systematically and providing detailed diagnosis information so as to help medical staff to better know the condition of a patient and make reasonable treatment schemes. In addition, the heart pacing system provided by the invention can be used for evaluation, diagnosis, treatment and the like of various heart rhythms, and can enable equipment to be more flexible and simple to realize improvement and innovation of a treatment scheme.
Furthermore, the control module can also identify different degrees of ventricular premature beat by judging three conditions, and provide more detailed information for evaluation, diagnosis and treatment of various cardiac rhythms; while the subject can freely select the desired identification requirements, the device can be made to provide a more physiological therapeutic solution.
Drawings
Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. Wherein:
FIG. 1 is a workflow of a cardiac pacing system provided in an embodiment of the present invention;
fig. 2 is a block diagram of hardware components of a cardiac pacing system according to an embodiment of the present invention.
In the accompanying drawings:
01-a main control unit; 02-a time control unit; 03. 04-data/information interaction interface; 05-a pacing module; 06-a perception module; 07-program control unit; 08-a control module; 09-digital/analog module.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" and the term "front" or "rear" generally refers to a chronological order, unless otherwise indicated.
An embodiment of the present invention provides a cardiac pacing system, comprising: the sensing module and the control module are preferably in communication connection through a data/information interaction interface.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a workflow of a cardiac pacing system according to an embodiment of the present invention, and fig. 2 is a component structure diagram of hardware of the cardiac pacing system according to an embodiment of the present invention. As shown in fig. 1, the working process of the cardiac pacing system provided in this embodiment specifically includes:
step 1: sensing a ventricular event (defined as a second ventricular event, i.e., a current ventricular event); namely, step 1 is a precondition for executing the following steps; here, the second ventricular event occurs after the previous ventricular event (defined as the first ventricular event), and the first ventricular event may specifically include ventricular sensing or ventricular pacing;
step 2: determining whether an atrial event is missing between the current ventricular event and the previous ventricular event (i.e., the first ventricular event and the second ventricular event);
if yes, outputting step A1: judging the current ventricular event (namely, the second ventricular event) as ventricular premature event PVC (A1); if not, executing the step 3;
step 3: judging whether the current AV interval (A is an abbreviation of Atria, V is an abbreviation of Ventricules, refers to an interval between a current Ventricular event and a previous atrial event) is out of a first standard range; if yes, outputting step A1: judging the current ventricular event (namely, the second ventricular event) as ventricular premature event PVC (A1); if not, executing the step 4;
step 4: judging whether the current VV interval (the interval between the current ventricular event and the previous ventricular event) is smaller than a second standard interval or not; if yes, outputting step A1: judging the current ventricular event (namely, the second ventricular event) as ventricular premature event PVC (A1); if not, executing the step 5;
step 5: the current ventricular event (i.e., the second ventricular event) is determined to be a normal R-wave.
In general, cardiac pacing systems can be classified into dual-chamber pacing systems that sense and pace the ventricles and also sense and pace the atria, i.e., their sensing modules can be used to sense atrial events in addition to ventricular events. Whereas the single-chamber pacing system described herein is used only to sense and pace the ventricles.
In step 1, when the sensing module senses a ventricular event, the sensing module starts to enter a judging and comparing program for the current ventricular event;
when the cardiac pacing system is a dual-chamber pacing system, the sensing module is used for sensing an atrial event in addition to a ventricular event, so in step 2, if the sensing module senses that an atrial event is missing between the current ventricular event and the previous ventricular event, the control module can directly determine that the current ventricular event is the ventricular premature event PVC (A1). Further, this class of ventricular premature events may be identified as a first class of ventricular premature events PVC1 (output step a 11). The first type of ventricular premature event PVC1 is the most typical and at the same time the most readily identifiable ventricular premature, and is not a leading atrial event, i.e., is not triggered by an atrial potential download, but is caused by ventricular ectopic activation points. This type of PVC appears to be completely AV asynchronous, with RR intervals advanced. The first type of ventricular premature event PVC1 determined may provide a reference for diagnosis or treatment by a physician, for example, requiring special treatment or ignoring such ventricular premature events.
In addition, in step 3, if the sensing module senses that there is an atrial event between the current ventricular event and the previous ventricular event, but the AV interval between the atrial event and the previous ventricular event is outside the first standard range, the control module may also determine that the current ventricular event is the ventricular premature event PVC (A1). The first standard range can be set according to the time sequence of the normal heart events, and is a range within a section [ first set value, second set value ], namely, the first standard range is not smaller than the first set value and not larger than the second set value, the first set value is a lower limit value of the first standard range, and the second set value is an upper limit value of the first standard range. The first setting value and the second setting value can be set according to the time sequence of normal cardiac events or according to experience of doctors and specific conditions of patients, for example, the first setting value is selected for 30ms, the second setting value is selected for 300ms, and the like, and it is understood that the first setting value is smaller than the second setting value. If the AV interval is not within the first criteria, it indicates that the current ventricular event is not a download of a previous atrial event, and is an ventricular premature event.
Further, at this time, further discrimination may be performed on the AV interval, i.e. step 6: it is determined whether the AV interval is smaller than a first set value. If the AV interval is less than the first set point, the control module determines that the current ventricular event is a second ventricular premature event PVC2 (output step A12). The second type of ventricular premature event PVC2 may observe a leading atrial event in the device, but the AV interval length is too small to be within the normal range (i.e., the first standard range), while the AV is still considered unassociated, asynchronous. This type of PVC appears to be incomplete AV asynchrony with insignificant RR interval variation. Similarly, the second type of ventricular premature event PVC2 may be determined to provide a reference for diagnosis or treatment by the physician, e.g., may be treated as normal Vs (ventricular sense) during normal pacing timing; as another example, it may be desirable to count or otherwise specifically treat a portion of the diagnostic or therapeutic functions.
If, in the determination in step 6, the AV interval is greater than the first set value, the AV interval is actually greater than the second set value because it has been determined in the preceding step 3 of step 6 that the AV interval is outside the first standard range. At this point, the control module determines the current ventricular event to be a third type of ventricular premature event PVC3 (output step a 13). The third class of ventricular premature events PVC3 can observe a leading atrial event in the device, but the AV interval is too long to be within normal range, while AV is still considered unassociated, asynchronous. This type of PVC exhibits partial AV synchronization, with slightly prolonged RR (R being ventricular depolarization) intervals. Similarly, the third type of ventricular premature event PVC3 may be used to provide a reference for diagnosis or treatment of a doctor, for example, may be treated as normal Vs in normal pacing timing, and generally may need to be counted in part of the diagnosis or treatment functions (e.g., the pacemaker may count the number of premature events in a preset time period, so as to provide a basis for diagnosis of the doctor, or may be specially treated (e.g., applied to the pacemaker, the pacemaker presets a corresponding function, and the pacemaker makes a corresponding treatment measure when such premature events occur).
If in step 3, the sensing module senses that the AV interval between the atrial event and the current ventricular event is within the first standard range, step 4 is continuously performed.
In step 4, if the VV interval between the current ventricular event and the previous ventricular event is less than the second standard interval, the control module may determine that the current ventricular event is the ventricular premature event PVC (A1). The value of the second standard interval may be set according to the specific condition of the patient, or may be set according to a standard VV interval calculated from values of a plurality of VV intervals preceding the current VV interval. Preferably, the second standard interval is a product of an average value of R VV intervals consecutive before the current VV interval and the first coefficient M, where R is a natural number not less than 2 and M is a percentage. Here, the average value of R VV intervals consecutive before the current VV interval may be defined as a standard VV interval, and the first coefficient M is used as the expansion threshold coefficient, and M and R may be selected according to the experience of a doctor or the condition of a patient. For example, M may be 75% and R may be 16. Generally, if ventricular premature beat does not occur, the VV interval should be a relatively uniform value, on the basis of which an average value of a plurality of VV intervals is taken as a standard VV interval, and on the basis of which a first coefficient M is multiplied to expand the recognition range of normal ventricular events, so that occurrence of erroneous recognition can be avoided.
Further, at this time, further discrimination may be performed on the VV interval, i.e. step 7: judging whether the VV interval is smaller than a third standard interval, and if the VV interval is smaller than the third standard interval, determining that the current ventricular event is a fourth-class ventricular premature event PVC4 by the control module (outputting step A14); wherein the third standard interval is smaller than the second standard interval. Preferably, the third standard interval is a product of an average value of R VV intervals consecutive before the current VV interval and a second coefficient N, where R is a natural number not less than 2 and N is a percentage, where N and R may be selected according to experience of a doctor or a patient, for example, N may be 45% and R may be 16. Here, when the VV interval is smaller than the second criterion interval, it may be further judged whether it is still smaller than the third criterion interval to further judge the degree and type of ventricular premature beat at this time. If the VV interval is less than the third standard interval, a fourth class of ventricular premature event PVC4 is identified, such premature event typically occurring in a tachyarrhythmia or sudden tachyarrhythmia condition, in which AV is normally unassociated, and in a sudden tachyarrhythmia condition, AV is normally associated, and the RR interval is stable. Similarly, the fourth ventricular premature event PVC4 may be determined to provide a reference for diagnosis or treatment by a physician, e.g., the fourth ventricular premature event is typically treated as a normal Vs during normal pacing events, and may be counted or specially treated during diagnostic or therapeutic functions (or may be specially treated during advanced pacing therapy functions).
If, in the determination in step 7, the VV interval is not smaller than the third standard interval, the VV interval is actually within the range between the third standard interval and the second standard interval, since it has been determined in the step 4 in the preamble of step 7 that the VV interval is smaller than the second standard interval. At this point, the control module determines the current ventricular event to be a fifth type of ventricular premature event PVC5 (output step a 15). Such ventricular premature events typically occur with increased atrial rate, with leading atrial premature events, AV associations, RR intervals following the change in atrial rate; similarly, the judged fifth type of ventricular premature event PVC5 may provide a reference for diagnosis or treatment by a physician, e.g., may be treated as normal Vs (ventricular sense) in normal pacing timing; as another example, it may be desirable to count or otherwise specifically treat a portion of the diagnostic or therapeutic functions.
It should be understood that, the steps 2,3 and 4 are progressive options, and may be selected to be executed according to the needs, or some steps may be skipped, or may be directly executed from the middle step according to the applicability of the cardiac pacing system. For example, in some embodiments, the cardiac pacing system is a dual-chamber pacing system, but steps 1 and 2 may be performed only, i.e., only to identify whether the current ventricular event is a ventricular premature event PVC corresponding to case one, or further to identify whether the current ventricular event is a first type of ventricular premature event PVC1, without identifying and processing other types of ventricular premature events. In some embodiments, only step 1, step 2 and step 3 may be performed, corresponding to case two, to identify whether the current ventricular event is a ventricular premature event, or step 6 may be further performed to identify whether it is a second type of ventricular premature event PVC2 or a third type of ventricular premature event PVC3, without the need to identify and process other types of ventricular premature events; for example, in still other embodiments, when the cardiac pacing system is a single-chamber pacing system, the sensing module is only used to sense ventricular events, where steps 2 and 3 may be skipped, and step 4 is performed directly after step 1, followed by steps 5 or 7. In some cases, the degree of ventricular premature events need not be classified, but only whether they are qualitative, so that step 6 and step 7 may not be performed. The invention is not limited to the selection and execution of the steps 2 to 4.
Preferably, the control module marks the ventricular event by digital identification for external output. In this embodiment, the bit coded pattern method may be used to identify the type of ventricular event, for example, as shown in the following table:
| ventricular premature beat type | Event type |
| Bit 4-7 codes | Bit 0-3 codes |
Ventricular events can be identified with one byte, with the lower four-digit flag of the current event type (e.g., 2 for refractory extra-ventricular awareness, 6 for refractory intra-ventricular awareness); the upper four digits mark whether the current event is a ventricular premature event (e.g., 0 represents normal ventricular sense, 1,2,3,4,5 represents a first, second, third, fourth, and fifth types of ventricular premature event, respectively), if so, which type of ventricular premature event, e.g., the second type of refractory extra-ventricular premature event may be identified as "0x22". Through the classification identification and the identification, the heart pacing system can clearly know the specific information of the current sensing event and can be used for outputting the information outwards, so that the information can be flexibly used in functional modules such as diagnosis, treatment and the like.
Preferably, the cardiac pacing system further comprises: the control module is in communication connection with the sensing module through the data/information interaction interface.
More preferably, the cardiac pacing system further comprises a pacing module, and the pacing module is in communication connection with the control module through a data/information interaction interface; the control module controls the pacing module to operate in a predetermined mode according to a judgment result of the current ventricular event. For example, a corresponding function may be preset for the cardiac pacing system, and when the control module determines that the current ventricular event is a first type of ventricular premature event, the control module controls the pacing module to operate in a predetermined mode to perform a corresponding treatment. The predetermined mode may be specific to the corresponding function set in advance.
Referring to fig. 2, the hardware of the cardiac pacing system provided in this embodiment specifically includes: a control module 08, and a digital/analog module 09 connected to said control module 08. Here, the control module 08 may be a microprocessor, a control device, or the like. The invention is not limited in terms of the selection and implementation of the control module 08.
The control module 08 may comprise a main control unit 01, a time control unit 02 and a data/information interaction interface 03. The main control unit 01 can control the occurrence event, the event to be occurred, and the like, and can also record and count the occurrence event, such as a heart event, and the like. The main control unit 01 may selectively implement time-related control functions such as timing and timing through the time control unit 02, for example, the time control unit 02 may capture and record the time of occurrence of an event, and may also control the accurate time of occurrence of the event to be occurred. The data/information interaction interface 03 is configured to interact with data or information, etc. between other modules in the device, such as the digital/analog module 09. The data/information interaction interface 03 may be a common I/O interface, or may be a serial or parallel data transmission module, where the data/information interaction interface 03 may be capable of receiving sensing event information, issuing a pacing event request, serial data interaction, clock data interaction, etc., and for example, the pacing signal and the sensing signal implement interactive communication through an I/O line.
The digital/analog module 09 may include a sensing module 06 and a pacing module 05, and may further include a data/information interaction interface 04 and a programmed unit 07; the pacing module 05 comprises a pacing control/generation unit and the sensing module 06 comprises a sensing control/amplification unit. The data/information interaction interface 04 can be in signal connection with a corresponding data/information interaction interface (e.g. the data/information interaction interface 03 located in the control module) to interact with, but the implementation may be different. The pacing control/generation unit accepts a pacing request from the microprocessor and generates a signal of a desired intensity to an external, such as a ventricle or ventricle. Of course, in some embodiments, the pacing control/generation unit may also assume a small portion of the control functions at the same time, such as fine tuning the pacing signal based on differences in the subject, strength of the signal, type, etc. The perceptual control/amplification unit is able to capture and distinguish and inform the control module 08 of external real signals, such as heart signals, and to amplify the signals as required. The program control unit 07 can interact with the outside, such as a user, for example, receives a user mode switching operation request, transmits the request information to the main control unit 01 through the data/information interaction interface 04 and the data/information interaction interface 03, and controls the main control unit 01 to realize mode switching. In particular, the sensing module 06 is always on regardless of the mode in which the cardiac pacing system is operating.
In summary, the cardiac pacing system provided by the present invention includes a sensing module and a control module; when the sensing module senses that an atrial event is absent between the current ventricular event and the previous ventricular event; alternatively, the AV interval is outside the first standard range; alternatively, the VV interval is less than the second standard interval; the control module determines that the current ventricular event is a ventricular premature event. Therefore, the heart pacing system provided by the invention can be used for identifying ventricular premature events in detail and systematically and providing detailed diagnosis information so as to help medical staff to better know the condition of a patient and make reasonable treatment schemes. In addition, the heart pacing system provided by the invention can be used for evaluation, diagnosis, treatment and the like of various heart rhythms, and can enable equipment to be more flexible and simple to realize improvement and innovation of a treatment scheme.
Furthermore, the control module can also identify different degrees of ventricular premature beat by judging three conditions, and provide more detailed information for evaluation, diagnosis and treatment of various cardiac rhythms; while the user can freely select the needed identification requirement, the device can provide a more physiological treatment solution
It should be noted that the above-provided hardware configuration of the cardiac pacing system should be regarded as a preferred example of the type of device for implementing the present invention, and the present invention is not limited thereto.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (9)
1. A cardiac pacing system comprising a control module and a sensing module coupled to the control module;
the control module is configured to determine that the current ventricular event is an ventricular premature event based on one of:
case one: when the sensing module senses that an atrial event is absent between the current ventricular event and the previous ventricular event;
and a second case: when the sensing module senses that an atrial event exists between the current ventricular event and the previous ventricular event, and the AV interval between the atrial event and the current ventricular event is out of a first standard range;
and a third case: the cardiac pacing system is a dual-cavity pacing system, the sensing module senses that an atrial event exists between a current ventricular event and a previous ventricular event, and when the AV interval between the atrial event and the current ventricular event is within a first standard range, the sensing module senses that the VV interval between the current ventricular event and the previous ventricular event is smaller than a second standard interval; alternatively, the cardiac pacing system is a single-chamber pacing system, and the sensing module senses that a VV interval between a current ventricular event and a previous ventricular event is less than a second standard interval;
the control module is configured to determine, as a function of a condition, that the current ventricular event is a first type of ventricular premature event.
2. The cardiac pacing system of claim 1, wherein the control module is configured to determine the current ventricular event as a second type of ventricular premature event based on condition two and when the AV interval is less than a first set point; the first set value is the lower limit value of the first standard range.
3. The cardiac pacing system of claim 1, wherein the control module is configured to determine that the current ventricular event is a third type of ventricular premature event based on case two and when the AV interval is greater than a second set value; the second set value is the upper limit value of the first standard range.
4. The cardiac pacing system of claim 1, wherein the control module is configured to determine that the current ventricular event is a fourth type of ventricular premature event based on case three and when the VV interval is less than a third standard interval; wherein the third standard interval is smaller than the second standard interval.
5. The cardiac pacing system of claim 4, wherein the control module is configured to determine that the current ventricular event is a fifth type of ventricular premature event based on case three and when the VV interval is not less than the third standard interval.
6. The cardiac pacing system of claim 4 or 5, wherein the second standard interval is a product of an average of R consecutive VV intervals preceding the VV interval, where R is a natural number not less than 2, and a first coefficient M, where M is a percentage.
7. The cardiac pacing system of claim 4 or 5, wherein the third standard interval is a product of an average of R consecutive VV intervals preceding the VV interval, where R is a natural number not less than 2, and a second coefficient N, where N is a percentage.
8. The cardiac pacing system of claim 1, further comprising a pacing module, the pacing module being coupled to the control module; the control module controls the pacing module to work according to the corresponding mode according to the judging result of the current ventricular event.
9. The cardiac pacing system of claim 1, wherein the control module marks the atrial event for external output by digital identification.
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| CN105999549A (en) * | 2016-06-07 | 2016-10-12 | 创领心律管理医疗器械（上海）有限公司 | Medical device for reducing and diagnosing unnecessary cardiac pacing |
| CN106362289A (en) * | 2016-09-23 | 2017-02-01 | 乐普医学电子仪器股份有限公司 | Method for eliminating atrial far-field signals in ventricular channels for implantable cardiac pacemaker |
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| US7502646B2 (en) * | 2006-07-31 | 2009-03-10 | Medtronic, Inc. | Pacing mode event classification with rate smoothing and increased ventricular sensing |
| US8306620B2 (en) * | 2009-09-30 | 2012-11-06 | Medtronic, Inc. | Pace discrimination of tachycardia using atrial-ventricular pacing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101522259A (en) * | 2006-07-31 | 2009-09-02 | 美敦力公司 | System and method for determining phsyiologic events during pacing mode operation |
| CN104623809A (en) * | 2015-02-17 | 2015-05-20 | 上海微创医疗器械（集团）有限公司 | Medical equipment for treating arrhythmia |
| CN105999549A (en) * | 2016-06-07 | 2016-10-12 | 创领心律管理医疗器械（上海）有限公司 | Medical device for reducing and diagnosing unnecessary cardiac pacing |
| CN106362289A (en) * | 2016-09-23 | 2017-02-01 | 乐普医学电子仪器股份有限公司 | Method for eliminating atrial far-field signals in ventricular channels for implantable cardiac pacemaker |
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