1
Johannes S van der Veen, Geeske van Oort: Dual chamber pacing system and method with control of AV interval. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, February 3, 1998: US05713930 (97 worldwide citation)

A dual chamber pacemaker system and method is provided for adjusting AV delay to provide for an optimal AV setting for a selected pacing application. In the inventive system and method, the basis for determining the AV delay setting is to perform a ventricular fusion test, wherein variations in QT i ...


2
Malcolm J S Begemann, Bernhard de Vries, Johannes S van der Veen: Pacemaker with optimized rate responsiveness and method of rate control. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, November 19, 1991: US05065759 (82 worldwide citation)

A pacemaker system is provided for rate responsive pacing, wherein rate is controlled as a function of two or more sensor inputs, each sensor providing a signal representing a respective different control parameter. Preferably a first sensor signal represents a physiologically accurate although slow ...


3
Frits M van Krieken, Gustaaf A Stoop, Johannes S van der Veen: Rate adaptive dual chamber pacing system and method with automatic adjustment of operating parameters for minimizing sensor-sinus competition. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, February 21, 1995: US05391189 (64 worldwide citation)

There is disclosed a pacemaker, a dual chamber VDD(R) or DDD(R) pacemaker, having improved features for avoiding undesired sensor-sinus competition and providing blended sensor and sinus (atrial) control. The pacemaker employs atrial hysteresis which is used during sensing of natural atrial beats in ...


4
Malcolm J S Begemann, Johannes S Van Der Veen, Xander Evers: Pacemaker system with improved techniques for preventing and suppressing atrial arrhythmias. Vitatron Medical, Michael J Jaro, Harold Patton, November 2, 1999: US05978709 (56 worldwide citation)

There is provided a pacing system having special functions for treating the patient's atrium with atrial pacing so as to reduce the probability of occurrence of dangerous atrial arrhythmias. The pacemaker of the system provides for atrial Pace.sub.-- Conditioning, whereby the patient's normal intrin ...


5
Frits M van Krieken, Johannes S van der Veen: Pacemaker system with PAC tracking based on QT data. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, July 21, 1998: US05782887 (37 worldwide citation)

A dual chamber pacemaker system and method provide for safe tracking of PACs. The pacemaker obtains an indication of when the T-wave has occurred within the cycle when the PAC occurs, either by measuring the T wave during the cycle, or by getting a QT interval measure from one or more prior cycles. ...


6
Xander Evers, Johannes S van der Veen, Malcolm J S Begemann: Pacemaker system with enhanced programmable modification capacity. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, December 1, 1998: US05843138 (37 worldwide citation)

A pacemaker system is provided which provides for more flexibility in re-programming of the control software, or program which is controlling an implanted pacemaker. The system comprises an external programmer device which is capable both of programming the implanted device in a conventional way, an ...


7
Malcolm J S Begemann, Gustaaf A P Stoop, Johannes S van der Veen: Dual chamber pacing system with dynamic physiological tracking and method of timing delivered stimulus for optimized synchronous pacing. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, September 28, 1993: US05247930 (29 worldwide citation)

A dual chamber pacemaker system is provided having means for determining when sensed atrial signals have a physiological rate, and tracking only such sensed atrial signals as are found to have physiological rates. The pacemaker provides logic means for continuously determining a physiological rate a ...


8
Gustaaf A P Stoop, Johannes S van der Veen, Malcolm J S Begemann: Dual chamber pacemaker with AV extension and PMT control. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, September 28, 1993: US05247929 (29 worldwide citation)

A dual chamber pacemaker is provided having incorporated therein a VA conduction test for concurrently testing for the conditions of retrograde conduction (RC) and far field R wave sensing (FFRS). The pacemaker changes the AV or VV interval to a predetermined interval over a number of pacemaker cycl ...


9
Bernardus F M Vonk, Geeske van Oort, Johannes S van der Veen: Pacemaker system and method with improved capture detection and threshold search. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, April 21, 1998: US05741312 (26 worldwide citation)

There is provided a pacemaker system with capture verification and threshold testing, in which the pacemaker waits after each change in delivered pace pulses for a stabilization interval, in order to minimize polarization and enhance capture verification. The threshold test utilizes a pace pulse pai ...


10
Johannes S van der Veen, Gustaaf A Stoop, Frits M van Krieken: VDD (R) pacing system. Vitatron Medical, Woodcock Washburn Kurtz Mackiewicz & Norris, October 3, 1995: US05454836 (18 worldwide citation)

A VDD-type pacing system which may have a floating atrial electrode analyzes P-wave events and absences of P-waves to determine data indicative of the likelihood of P-wave undersensing. The pacemaker logic chooses a reaction algorithm to respond to atrial events in accordance with whether an absence ...