Means and method for the detection of cardiac events
First Claim
1. A system for detecting cardiac events in a human patient, the system including:
- at least two electrodes for obtaining an electrical signal from the patient'"'"'s heart;
processor means designed to detect at least one type of cardiac event by processing the electrical signal from the patient'"'"'s heart;
patient alerting means that are activated following the detection of a cardiac event by the processor means, the patient alerting means providing an alarm signal to the patient for a first period of time which is an initial alarm on-period, the initial alarm on-period being followed by an alarm off-period of time during which time the alarm signal is turned off, the patient alerting means also providing a reminder alarm signal to the patient for a reminder alarm on-period of time following the alarm off-period of time.
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Accused Products
Abstract
Disclosed is a system for the detection of cardiac events that includes an implanted device called a cardiosaver, a physician'"'"'s programmer and an external alarm system. The system is designed to provide early detection of cardiac events such as acute myocardial infarction or exercise induced myocardial ischemia caused by an increased heart rate or exertion. The system can also alert the patient with a less urgent alarm if a heart arrhythmia is detected. Using different algorithms, the cardiosaver can detect a change in the patient'"'"'s electrogram that is indicative of a cardiac event within five minutes after it occurs and then automatically warn the patient that the event is occurring. To provide this warning, the system includes an internal alarm sub-system (internal alarm means) within the cardiosaver and/or an external alarm system (external alarm means) which are activated after the ST segment of the electrogram exceeds a preset threshold.
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Citations
14 Claims
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1. A system for detecting cardiac events in a human patient, the system including:
- at least two electrodes for obtaining an electrical signal from the patient'"'"'s heart;
processor means designed to detect at least one type of cardiac event by processing the electrical signal from the patient'"'"'s heart;
patient alerting means that are activated following the detection of a cardiac event by the processor means, the patient alerting means providing an alarm signal to the patient for a first period of time which is an initial alarm on-period, the initial alarm on-period being followed by an alarm off-period of time during which time the alarm signal is turned off, the patient alerting means also providing a reminder alarm signal to the patient for a reminder alarm on-period of time following the alarm off-period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- at least two electrodes for obtaining an electrical signal from the patient'"'"'s heart;
Specification