Dual chamber pacer
Dual chamber pacemaker system with V-A time measurement apparatus and method
Dual chamber pacemaker
Method and apparatus for differentiating antegrade from retrograde P-waves and for preventing pacemaker generated tachycardia
Dual chamber pacemaker with automatic high rate limit mode determination
Pacemaker and method for ventricular rate limit operation and termination of pacemaker mediated tachycardia
Atrium-controlled heart pacemaker
Pacemaker having PVC response and PMT terminating features
Dual chamber pacemaker with adaptive atrial escape interval
ApplicationNo. 830656 filed on 02/04/1992
US Classes:607/14Treating or preventing abnormally high heart rate
ExaminersPrimary: Kamm, William E.
Attorney, Agent or Firm
International ClassA61N 001/362
AbstractA 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 cycles, and determines whether the VA interval remains substantially unchanged, i.e., the VA intervals are substantially equal. When VA interval equality is determined, the pacemaker checks the measure of VA interval with stored RC and FFRS criteria to determine whether either can be verified. Respective corrective steps are taken if either RC or FFRS is verified.