System and method for ventricular interval smoothing following a premature ventricular contraction
First Claim
Patent Images
1. An implantable medical device (IMD) comprising:
- means for sensing cardiac data;
means for identifying premature ventricular contractions (PVC) from the cardiac data;
means for pacing responsive to the means for sensing;
a ventricular pacing protocol (VPP) module for controlling the means for pacing and to prevent ventricular pacing in a given cardiac cycle wherein a ventricular sensed event occurred in a cardiac cycle immediately prior to the given cardiac cycle; and
means for controlling a V-V interval immediately following and initiated by an identified PVC by selectively varying an A-A interval.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device includes cardiac pacing functions. In order to reduce ventricular pacing, various modes are employed that tolerate missed ventricular beats, provide backup pacing and maintain overall AV synchrony. Upon the occurrence of a PVC, A-A timing is modified so that resultant V-V intervals are appropriate and ventricular pacing is avoided.
-
Citations
20 Claims
-
1. An implantable medical device (IMD) comprising:
-
means for sensing cardiac data; means for identifying premature ventricular contractions (PVC) from the cardiac data; means for pacing responsive to the means for sensing; a ventricular pacing protocol (VPP) module for controlling the means for pacing and to prevent ventricular pacing in a given cardiac cycle wherein a ventricular sensed event occurred in a cardiac cycle immediately prior to the given cardiac cycle; and means for controlling a V-V interval immediately following and initiated by an identified PVC by selectively varying an A-A interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An implantable medical device (IMD) comprising:
-
a cardiac pacing module; a ventricular pacing protocol (VPP) module configured to control the pacing module and prevent ventricular pacing in a given cardiac cycle wherein a ventricular sensed event occurred in a cardiac cycle immediately prior to the given cardiac cycle and permit ventricular pacing in the given cardiac cycle if no ventricular event was sensed in the immediately prior cardiac cycle; and a ventricular interval smoothing module configured to respond to a sensed PVC and alter atrial intervals to create one or more consecutive V-V intervals having a progressively larger duration without providing ventricular pacing. - View Dependent Claims (10)
-
-
11. A method comprising:
-
operating a cardiac pacing device according to a ventricular pacing protocol (VPP); sensing a premature ventricular contraction (PVC) in a first cardiac cycle; measuring a duration of a first ventricular interval from a ventricular event immediately preceding the PVC to the PVC; calculating a duration of a second ventricular interval to occur from the PVC to a target ventricular sensed event; and modifying atrial timing in the first cardiac cycle to effect the second ventricular interval. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification