Myocardial ischemia and infarction analysis and monitoring method and apparatus
AssigneeOrtivus Medical AB
InventorsPer Karlsson, Gunilla Lundahl, Michael Oljemark, Johan Ubby
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Abstract
A cardiac monitoring method and system provides advanced ischemia and infarction analysis and monitoring. Advanced calculations are performed on ECG signals to obtain parameter values relating to myocardial ischemia and infarction. Dominant heart beats are averaged to form a smooth beat, which is analyzed to determine the parameter values continuously and in real-time. The result of each analyzed time interval is presented as points in a trend graph on a monitoring display. All calculations are performed on-line and the trend curves are updated immediately.
Claims20
A myocardial ischemia and infarction analysis and monitoring method comprising the steps of:
- receiving a number of ECG signals relating to the heartbeat of at least one patient;
- converting the received number of ECG signals into three perpendicular ECG signals;
- determining, for each occasion that a number of ECG signals is received, whether or not the number of ECG signals correspond to a normal heartbeat;
- determining, for each occasion that a number of ECG signals is received, whether or not the signal quality of the ECG signals exceeds a minimum level;
- determining an average heartbeat from only those ECG signals which correspond to a normal heartbeat and for which the signal quality exceeds a minimum level;
- calculating a plurality of parameters related to the ischemic condition of each patient from said number of ECG signals;
- generating electric signals representative of the value of said plurality of parameters related to the ischemic condition of each patient;
- storing said electric signals representative of the value of said plurality of parameters related to the ischemic condition of each patient in a memory;
- and
- repeating the steps of determining said average heartbeat, calculating said plurality of parameters, generating electric signals and storing said electric signals for as long as ECG signals continue to be received or until the memory is full.
A myocardial ischemia and infarction analysis and monitoring system comprising:
- at least one patient monitor, each patient monitor having an analyzing circuit for receiving a number of ECG signals relating to the heartbeat of a corresponding patient, for determining, for each occasion that the number of ECG signals is received, whether or not the number of ECG signals correspond to a normal heartbeat, for determining, for each occasion that the number of ECG signals is received, whether or not the signal quality of the ECG signals exceeds a minimum level, for determining an average heartbeat from only those ECG signals which correspond to a normal heartbeat and for which the signal quality exceeds the minimum level, and for calculating therefrom a plurality of parameters related to the ischemic condition of the corresponding patient, and a display for displaying at least one of said plurality of parameters substantially in real time;
- a central workstation for receiving and storing data from each patient monitor, said data including said at least one of said plurality of parameters;
- a central monitoring unit for simultaneously displaying said at least one of said plurality of parameters received from each patient monitor;
- and
- a network for transferring data between each patient monitor, said central workstation, and said central monitoring unit.
A myocardial ischemia and infarction analysis and monitoring system comprising:
- at least one patient monitor, each patient monitor having an analyzing circuit for receiving a number of ECG signals relating to the heartbeat of a corresponding patient and calculating therefrom a plurality of parameters related to the ischemic condition of the corresponding patient, and a display for displaying at least one of said plurality of parameters substantially in real time;
- a central workstation for receiving and storing data from each patient monitor, said data including said at least one of said plurality of parameters;
- a central monitoring unit for simultaneously displaying said at least one of said plurality of parameters received from each patient monitor;
- and
- a network for transferring data between each patient monitor, said central workstation, and said central monitoring unit;
- wherein the analyzing circuit of each patient monitor continuously records a number of perpendicular lead signals corresponding to said number of ECG signals and calculates a second number of ECG signals from said recorded number of perpendicular lead signals in response to a request by a user.
Dependencies are inferred from the claim text.