Frank R. Walmsley - North Oaks MN Arthur L. Olive - Stacy MN Jan Pieter Heemels - Minneapolis MN
Assignee:
Cardiac Pacemakers, Inc. - St. Paul MN
International Classification:
A61N 1368
US Classification:
607 14
Abstract:
A dual chamber pacemaker incorporating an adaptive PVARP for breaking pacemaker mediated tachycardia episodes and adjusting the PVARP interval in a way that reduces future incidences of PMT without extending PVARP beyond what is required.
Method And Apparatus For Rate-Responsive Cardiac Pacing
Frank R Walmsley - North Oaks MN Jan-Pieter Heemels - Minneapolis MN
Assignee:
Cardiac Pacemakers - St. Paul MN
International Classification:
A61N 1365
US Classification:
607 17
Abstract:
Pacemakers have been known to be provided with a lower rate hysteresis mode in which a range of cardiac activity is supported in a hysteresis loop by a pacemaker. The present invention describes a programmable single or dual chamber pacemaker comprising a sensor device which provides signals indicating a level of cardiac activity. The pacemaker has a standard lower rate hysteresis mode available, but is also provided with a sensor rate hysteresis which may be programmable. The signals from the sensor can cause the pacemaker to operate within a hysteresis loop in which at least one of the A-sense Rate and the V-sense Rate in the sensor rate hysteresis is higher than the similar rate in the lower rate hysteresis.
Glenn Roline - Anoka MN Frank Walmsley - New Brighton MN
Assignee:
Medtronic, Inc. - Minneapolis MN
International Classification:
A61N 136
US Classification:
128419PG
Abstract:
A multiple-mode pacer which automatically switches from an atrial synchronous mode to a ventricular inhibited mode when the intrinsic atrial rate drops below a preset hysteresis rate. This mode switching prevents atrial bradycardia from resulting in the delivery of closely spaced ventricular stimulating pulses.