Maximum pacing rate limiter implemented using the evoked response—T-wave interval
First Claim
1. A pacing rate limiter for limiting a paced heart rate, the pacing rate limiter comprising:
- a port adapted to receive a sensor indicated heart rate;
an evoked response (ER) sensor adapted to detect a paced ventricular evoked response;
a T sensor adapted to detect a T-wave; and
a main unit adapted to calculate an evoked response T-wave (ERT) rate based on the paced ventricular evoked response and the T-wave and to compare the ERT rate to the sensor indicated heart rate to provide a maximum pacing rate.
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Abstract
A maximum pacing rate limiter for use in adaptive rate pacing in conjunction with a cardiac rhythm management system for a heart. The maximum pacing rate limiter may function to measure an interval, termed the ERT interval, between a paced ventricular evoked response and a T-wave. The maximum pacing rate limiter may further function to maintain the ERT interval at less than a certain percentage of the total cardiac cycle. In one disclosed embodiment, a maximum pacing rate limiter calculates an ERT rate based on the detected paced ventricular evoked response and the T-wave, and the pacing rate limiter module further communicates the minimum of the ERT rate and an adaptive-rate sensor indicated rate to a pacemaker.
87 Citations
14 Claims
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1. A pacing rate limiter for limiting a paced heart rate, the pacing rate limiter comprising:
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a port adapted to receive a sensor indicated heart rate; an evoked response (ER) sensor adapted to detect a paced ventricular evoked response; a T sensor adapted to detect a T-wave; and a main unit adapted to calculate an evoked response T-wave (ERT) rate based on the paced ventricular evoked response and the T-wave and to compare the ERT rate to the sensor indicated heart rate to provide a maximum pacing rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification