Means and method for the detection of cardiac events
First Claim
1. A method for setting the thresholds for detecting excessive shift in the voltage of the ST segment of a patient'"'"'s electrogram, the method including the steps:
- (a) implanting a cardiosaver device having the capability to sense and store electrogram signals from the patient'"'"'s heart;
(b) causing the patient'"'"'s heart to have at least two different heart rates where a first heart rate is a lower rate compared to a second heart rate which is a higher heart rate;
(c) measuring the patient'"'"'s ST segment voltage at each of the at least two different heart rates;
(d) programming the detection thresholds for excessive shift in the voltage of the ST segment of the patient'"'"'s electrogram based on the electrogram data processed for the at least two different heart rate ranges.
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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.
20 Citations
5 Claims
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1. A method for setting the thresholds for detecting excessive shift in the voltage of the ST segment of a patient'"'"'s electrogram, the method including the steps:
- (a) implanting a cardiosaver device having the capability to sense and store electrogram signals from the patient'"'"'s heart;
(b) causing the patient'"'"'s heart to have at least two different heart rates where a first heart rate is a lower rate compared to a second heart rate which is a higher heart rate;
(c) measuring the patient'"'"'s ST segment voltage at each of the at least two different heart rates;
(d) programming the detection thresholds for excessive shift in the voltage of the ST segment of the patient'"'"'s electrogram based on the electrogram data processed for the at least two different heart rate ranges. - View Dependent Claims (2, 3, 4, 5)
- (a) implanting a cardiosaver device having the capability to sense and store electrogram signals from the patient'"'"'s heart;
Specification