Method and apparatus for avoidance of phrenic nerve stimulation during cardiac pacing
First Claim
Patent Images
1. A cardiac rhythm management device, comprising:
- one or more sensing/pacing channels, each such channel comprising an electrode for disposing near a chamber of the heart, a pulse generator for outputting pacing pulses, and a sense amplifier for detecting sense signals;
an accelerometer for sensing accelerations imparted to a device housing and generating an accelerometer signal in accordance therewith;
a controller for controlling the operation of pulse generators used in a selected pacing configuration in accordance with a programmed pacing mode; and
, wherein the controller is programmed to compare the accelerometer signal obtained during a pacing time window subsequent to the output of a pacing pulse with a signature to determine if skeletal muscle contraction has occurred.
1 Assignment
0 Petitions
Accused Products
Abstract
A cardiac rhythm management device in which an accelerometer is used to detect diaphragmatic or other skeletal muscle contraction associated with the output of a pacing pulse. Upon detection of diaphragmatic contraction, the device may be configured to automatically adjust the pacing pulse energy and/or pacing configuration.
104 Citations
22 Claims
-
1. A cardiac rhythm management device, comprising:
-
one or more sensing/pacing channels, each such channel comprising an electrode for disposing near a chamber of the heart, a pulse generator for outputting pacing pulses, and a sense amplifier for detecting sense signals;
an accelerometer for sensing accelerations imparted to a device housing and generating an accelerometer signal in accordance therewith;
a controller for controlling the operation of pulse generators used in a selected pacing configuration in accordance with a programmed pacing mode; and
,wherein the controller is programmed to compare the accelerometer signal obtained during a pacing time window subsequent to the output of a pacing pulse with a signature to determine if skeletal muscle contraction has occurred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method for operating a cardiac rhythm management device, comprising:
-
sensing cardiac depolarizations via one or more sensing/pacing channels, each such channel comprising an electrode for disposing near a chamber of the heart, a pulse generator for outputting pacing pulses, and a sense amplifier for detecting sense signals;
outputting pacing pulses through selected sensing/pacing channels used in a selected pacing configuration in accordance with a programmed pacing mode;
comparing an accelerometer signal obtained during a pacing time window subsequent to the output of a pacing pulse with a signature to determine if skeletal muscle contraction has occurred. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification