Implantable medical device with ventricular pacing protocol including progressive conduction search
First Claim
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1. A method comprising:
- operating an implantable medical device with a Ventricular Pacing Protocol;
initiating a conduction check while in a dual chamber pacing mode having an AV interval at a first duration to determine if intrinsic conduction is present, the conduction check including incrementally increasing a duration of the AV interval in the dual chamber pacing mode over subsequent cardiac cycles until a maximum AV interval is reached, then operating in an atrial based pacing mode for one cardiac cycle;
operating in the atrial based pacing mode if the conduction check identifies the presence of intrinsic conduction;
operating in the dual chamber pacing mode and at the AV interval of the first duration if no intrinsic conduction is sensed during the one cardiac cycle.
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Abstract
An implantable medical device operates to promote intrinsic ventricular depolarization according to a pacing protocol. The medical device operates to promote intrinsic conduction by providing elongated AV intervals or operating in an atrial based pacing mode. Conduction checks to determine if AV conduction is present are performed on a graduated or progressive scale to facilitate intrinsic emergence.
110 Citations
18 Claims
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1. A method comprising:
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operating an implantable medical device with a Ventricular Pacing Protocol;
initiating a conduction check while in a dual chamber pacing mode having an AV interval at a first duration to determine if intrinsic conduction is present, the conduction check including incrementally increasing a duration of the AV interval in the dual chamber pacing mode over subsequent cardiac cycles until a maximum AV interval is reached, then operating in an atrial based pacing mode for one cardiac cycle;
operating in the atrial based pacing mode if the conduction check identifies the presence of intrinsic conduction;
operating in the dual chamber pacing mode and at the AV interval of the first duration if no intrinsic conduction is sensed during the one cardiac cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable medical device comprising:
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means for operating an implantable medical device with a Ventricular Pacing Protocol;
means for initiating a conduction check while in a dual chamber pacing mode having an AV interval at a first duration to determine if intrinsic conduction is present and means for incrementally increasing a duration of the AV interval during the conduction check in the dual chamber pacing mode over subsequent cardiac cycles until a maximum AV interval is reached, then operating in an atrial based pacing mode for one cardiac cycle;
means for operating in the atrial based pacing mode if the conduction check identifies the presence of intrinsic conduction; and
means for operating in the dual chamber pacing mode and at the AV interval of the first duration if no intrinsic conduction is sensed during the one cardiac cycle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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operating an implantable medical device (IMD) in a dual chamber pacing mode with an AV interval of a first duration;
extending the duration of the AV interval in each of a plurality of subsequent consecutive cardiac cycles until a maximum AV interval is reached; and
operating the implantable medical device in an atrial based pacing mode in a cardiac cycle immediately subsequent to the cardiac cycle with the maximum AV interval. - View Dependent Claims (16, 17, 18)
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Specification