Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1994-10-26
1996-06-04
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 136
Patent
active
055228585
ABSTRACT:
A dual chamber cardiac pacemaker system has logic for detecting high rate as well as normal atrial spontaneous signals, and for tracking atrial signals within a predetermined tracking rate range by delivering ventricular pace pulses at an AV interval following each atrial sense within said tracking range. The pacemaker also has detection circuitry for detecting a sequence of pacemaker cycles characterized by first degree AV block, wherein atrial sense signals occur too early to permit tracking, and ventricular spontaneous signals occur following an extended AV-delay such as is characterized by first degree block. The pacemaker restores tracking following detection of such a sequence by delivering ventricular pace pulses at an extended AV interval to override the spontaneous ventricle signals and gradually decreasing the AV-delay back to a normal value, thereby restoring tracking without pacing the ventricle at an excessive rate.
REFERENCES:
patent: 4467810 (1984-08-01), Vollmann
patent: 4562841 (1986-01-01), Brockway et al.
patent: 4967746 (1990-11-01), Vandegriff
patent: 5247930 (1993-09-01), Begemann et al.
patent: 5269299 (1993-12-01), Duncan
patent: 5273035 (1993-12-01), Markowitz et al.
van Gelder, Barry M. et al., "Apparent P Wave Undersensing in a DDD Pacemaker Post Exercise," PACE, vol. 15, Nov., Part I 1992, pp. 1651-1656.
Fearnot, Neal E., "A Review of Pacemakers That Physiologically Increase Rate: The DDD And Rate-Responsive Pacemakers," Progress in Cardiovascular Diseases, vol. XXIX, No. 2 (Sep./Oct. 1986), pp. 145-164.
Jastrzab Jeffrey R.
Kamm William E.
Vitatron Medical B.V.
LandOfFree
Pacemaker with improved reaction to stable first degree atrio-ve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pacemaker with improved reaction to stable first degree atrio-ve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pacemaker with improved reaction to stable first degree atrio-ve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-380190