04543963 is referenced by 50 patents and cites 12 patents.

An improved dual chamber cardiac pacing apparatus detects retrograde P-waves conduction by either determining polarity of the P-wave at a location in the right atrium adjacent the A-V node; or the sequence of signals which appear at this predetermined location and at a second predetermined location in the atrium in proximity to the sinus node. The pacing apparatus will ignore retrograde P-waves when initiating sequential pacing in the ventricle. In addition, the pacing apparatus will provide a burst of high rate atrial pacing pulses upon detection of the simultaneous occurrence of retrograde P-wave conduction, high rate heart beat and narrow QRS complexes.

Title
Method and apparatus for differentiating antegrade from retrograde P-waves and for preventing pacemaker generated tachycardia
Application Number
6/554179
Publication Number
4543963
Application Date
November 22, 1983
Publication Date
October 1, 1985
Inventor
Lawrence J Gessman
1929 West Point Ct., Cherry Hill, 08003
NJ, US
Agent
Benasutti and Murray
IPC
A61N 1/36
A61B 5/04
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