Apparatus and methods for controlling a cardiac pacemaker in the event of a ventricular extrasystole
AssigneeELA Medical S.A.
InventorsMarcel Limousin, Remy Nitzsche, Nicolas Rosset
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Abstract
Upon detection of a ventricular extrasystole, a pacing control algorithm is brought into play to trigger: a stimulation of the atrium, a controlling of the atrium at a faster pacing rate than that of the ventricle during some cycles, a synchronous controlling of the ventricle during a period that is a multiple of a programmed number of cycles, and subsequent to the programmed number of cycles, a slowing of the ventricular rate until either the programmed base rate is reached or a further sinus detection occurs. The algorithm is inactivated on certain conditions, inhibited on certain conditions, and reactivated on further sensed ventricular extrasystoles.
Claims44
A method for controlling a cardiac pacemaker which detects the occurrence of spontaneous atrial and ventricular electrical activity and stimulates atrial and ventricular activity and includes a basic pacing rate, comprising the steps of:
- determining the occurrence of a ventricular extrasystole and whether it is a frequent or non-frequent ventricular extrasystole;
- and
- in response to the occurrence of a ventricular extrasystole applying a pacing control algorithm, including an atrial pacing rate and a ventricular pacing rate, comprising the following steps:
- stimulating the atrium,
- controlling the atrium at a faster pacing rate than the ventricle during a few cardiac cycles,
- synchronously controlling the ventricle during a period that is a multiple of a programmed number of cardiac cycles, and
- subsequent to each programmed number of cycles, slowing the ventricular pacing rate until one of the basic pacing rate is reached and a sinus event is detected.
Apparatus for controlling a cardiac pacemaker comprising:
- means for monitoring atrial and ventricular electrical cardiac activity including detected and stimulated atrial and ventricular events and ventricular extrasystoles;
- means for stimulating the atrium and the ventricle;
- means for controlling the stimulating means for controllably stimulating separately the atrium and ventricle, said controlling means being responsive to the monitoring means and having a basic pacing rate;
- and
- means for determining the occurrence of a ventricular extrasystole and identifying non-frequent and frequent ventricular extrasystoles;
- wherein the controlling means responds to a sensed occurrence of a ventricular extrasystole by applying a pacing control algorithm including an atrial pacing rate and a ventricular pacing rate, and further comprising:
- means for stimulating the atrium and controlling the atrium at a faster pacing rate than the ventricle during some cardiac cycles,
- means for synchronously controlling the ventricle during a period that is a multiple of a programmed number of cardiac cycles, and subsequent to the programmed number of cycles, slowing the ventricular pacing rate until one of the basic pacing rate is reached and a sinus event is detected.
Dependencies are inferred from the claim text.