Pacemaker and method of operating same that provides functional

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61N 1362

Patent

active

058738959

ABSTRACT:
A special type of AV/PV hysteresis is provided in a dual-chamber pacemaker. A long AV delay is initially provided, thereby affording as much opportunity as possible for natural AV conduction to occur. Such long AV delay is automatically shortened should AV block occur. Periodic scanning for the return of AV conduction (absence of AV block) is performed so that the AV delay can be returned to its long value as soon as possible. In one embodiment, the pacemaker "learns" the natural conduction time (AR interval) of the patient and thereafter uses such learned natural conduction time as a reference against which subsequently measured AR intervals are compared to better distinguish conducted ventricular contractions from ectopic, pathologic, or other nonconducted ventricular contractions (e.g., PVC's). If the measured AR interval is approximately the same as the "learned" AR interval, then the R-wave at the conclusion of the measured AR interval is presumed to be a conducted R-wave that signals the return of AV conduction, and the AV delay is lengthened back to its original value. If, on the other hand, the measured AR interval is significantly different than the "learned" natural conduction time, then the R-wave at the conclusion of the measured AR interval is presumed to be a nonconducted R-wave, and the AV delay is kept short. In other embodiments, other techniques are used to distinguish a conducted R-wave from a nonconducted R-wave.

REFERENCES:
patent: 4467810 (1984-08-01), Vollmann
patent: 4485818 (1984-12-01), Leckrone et al.
patent: 4503858 (1985-03-01), Markowitz et al.
patent: 4539991 (1985-09-01), Boute et al.
patent: 4554920 (1985-11-01), Baker et al.
patent: 4554921 (1985-11-01), Boute et al.
patent: 4559947 (1985-12-01), Renger et al.
patent: 4561442 (1985-12-01), Vollmann et al.
patent: 4562841 (1986-01-01), Brockway et al.
patent: 4572193 (1986-02-01), Mann et al.
patent: 4577633 (1986-03-01), Berkovits et al.
patent: 4712555 (1987-12-01), Thornander et al.
patent: 4712556 (1987-12-01), Baker
patent: 4719921 (1988-01-01), Chirife
patent: 4726380 (1988-02-01), Vollmann et al.
patent: 4788980 (1988-12-01), Mann et al.
patent: 4809697 (1989-03-01), Causey et al.
patent: 4815469 (1989-03-01), Cohen et al.
patent: 4847617 (1989-07-01), Silvian
patent: 4872459 (1989-10-01), Pless et al.
patent: 4875483 (1989-10-01), Vollmann et al.
patent: 4880005 (1989-11-01), Pless et al.
patent: 4940052 (1990-07-01), Mann et al.
patent: 4940053 (1990-07-01), Mann et al.
patent: 4944298 (1990-07-01), Sholder
patent: 4974589 (1990-12-01), Sholder
patent: 5016630 (1991-05-01), Moberg
patent: 5040534 (1991-08-01), Mann et al.
patent: 5044365 (1991-09-01), Webb et al.
patent: 5063927 (1991-11-01), Webb et al.
patent: 5133350 (1992-07-01), Duffin
patent: 5144950 (1992-09-01), Stoop et al.
patent: 5237992 (1993-08-01), Poore
patent: 5269299 (1993-12-01), Duncan
patent: 5334220 (1994-08-01), Sholder
patent: 5340361 (1994-08-01), Sholder
patent: 5441522 (1995-08-01), Schuller
patent: 5507782 (1996-04-01), Keval et al.
Rosenqvist, et al., "Relative Importance of Activation Sequence Compared to Atrioventricular Synchrony in Left Ventricular Function", The American Journal of Cardiology, 67, pp. 148-156 (Jan. 15, 1991).
Askenazi, et al., "Alteration of Left Ventricular Performance by Left Bundle Branch Block Simulated with Atrioventricular Sequential Pacing", The American Journal of Cardiology, 53, pp. 99-104 (Jan. 1, 1984).
"Journal of the American College of Cardiology", Abstracts of Original Contributions, 41st Annual Scientific Session, American College of Cardiology, Dallas Texas, (Apr. 12-16, 1992).
Karpawich, et al., "Developmental sequelae of fixed-rate ventricular pacing in the immature canine heart: An electrophysiologic, hemodynamic, and histopathologic evaluation", American Heart Journal, 119:5; pp. 1077-1083 (May 1990).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pacemaker and method of operating same that provides functional 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 and method of operating same that provides functional , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pacemaker and method of operating same that provides functional will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-302491

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.