METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE
First Claim
1. A method of detecting a cardiac event in a medical device, comprising:
- sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector;
determining first heart rate estimates associated with cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector in response to a metric of heart rate associated with the sensed cardiac signals;
generating second heart rate estimates associated with the first sensing vector and with the second sensing vector in response to the determined first heart rate estimates; and
determining whether both of the second heart rate estimates are greater than a predetermined heart rate threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector and a second sensing vector, and determining first heart rate estimates associated with cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector in response to a metric of heart rate associated with the sensed cardiac signals. Second heart rate estimates associated with the first sensing vector and with the second sensing vector are generated in response to the determined first heart rate estimates, and a determination is made as to whether both of the second heart rate estimates are greater than a predetermined heart rate threshold.
-
Citations
20 Claims
-
1. A method of detecting a cardiac event in a medical device, comprising:
-
sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector;
determining first heart rate estimates associated with cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector in response to a metric of heart rate associated with the sensed cardiac signals;
generating second heart rate estimates associated with the first sensing vector and with the second sensing vector in response to the determined first heart rate estimates; and
determining whether both of the second heart rate estimates are greater than a predetermined heart rate threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of detecting a cardiac event in a medical device, comprising:
-
sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector;
determining first heart rate estimates associated with cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector in response to a metric of heart rate associated with the sensed cardiac signals, the metric of heart rate corresponding to one of a mean of a plurality of RR intervals associated with the sensed cardiac signals, a trimmed mean of the plurality of RR intervals, a median of the plurality of RR intervals, and a predetermined RR interval of the plurality of RR intervals;
determining whether asystole is detected for one of cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector;
clearing, in response to asystole being detected for one of cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector, a buffer storing the corresponding plurality of RR intervals;
determining whether the first heart rate estimates are reliable;
generating second heart rate estimates in response to the determining whether the first heart rate estimates are reliable; and
determining whether both of the second heart rate estimates are greater than a predetermined heart rate threshold. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. The method of claim 16, wherein determining whether the plurality of RR intervals are sensed at less than a first sensing threshold level comprises determining whether two RR intervals of the plurality of RR intervals are sensed at less than the sensing threshold, and wherein the plurality of RR intervals is equal to twelve RR intervals and the predetermined heart rate threshold is 180 beats per minute.
-
17. A computer readable medium having computer executable instructions for performing a method comprising:
-
sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a first sensing vector and a second sensing vector;
determining first heart rate estimates associated with cardiac signals sensed from the first sensing vector and cardiac signals sensed from the second sensing vector in response to a metric of heart rate associated with the sensed cardiac signals;
generating second heart rate estimates associated with the first sensing vector and with the second sensing vector in response to the determined first heart rate estimates; and
determining whether both of the second heart rate estimates are greater than a predetermined heart rate threshold. - View Dependent Claims (18, 19, 20)
-
Specification