Implantable pacemaker including means and method of terminating

Details Implantable pacemaker including means and method of terminating Implantable pacemaker including means and method of terminating

1991-10-08

1993-07-20

Kamm, William E.

Surgery

Truss

Pad

A61N 1368

Patent

active

052284387

ABSTRACT:
An atrial tracking dual-chamber pacemaker and method of use thereof for terminating a pacemaker-mediated tachycardia (PMT). The pacemaker includes means for determining whether the present heart rate exceeds a tachycardia reference rate, and if so, whether a PMT-indicating sequence of a tracked P-wave, including a retrograde P-wave followed by a V-pulse, occurs repetitiously for at least a predetermined number of cardiac cycles. The pacemaker includes means for measuring the interval between a P-wave and a V-pulse (PVI) and sets the PVI to 250 milliseconds when the measured value is less than 250 milliseconds. The pacemaker issues a PMT-terminating timed atrial pulse which is timed from a retrograde P-wave by a time equal to the PVI, plus a delay of about 25-100 milliseconds. In the event the atrial pulse fails to terminate the PMT, the process is repeated after a fixed number of cardiac cycles has occurred. An alternate embodiment includes determining a ventricular escape interval (VEI) which is equal to the AEI plus the PVI. Upon the delivery of the timed atrial pulse, the pacemaker changes to the VDD mode of operation, and immediately upon the occurrence of the following V-pulse which is a VEI displaced from the prior pulse, the pacemaker reverts to the DDD mode of operation.

REFERENCES:
patent: 4429697 (1984-02-01), Nappholz
patent: 4452248 (1984-06-01), Keller, Jr.
patent: 4485818 (1984-12-01), Leckrone et al.
patent: 4493325 (1985-01-01), Hartlaub et al.
patent: 4543963 (1985-10-01), Gessman
patent: 4554920 (1985-11-01), Baker, Jr. et al.
patent: 4554921 (1985-11-01), Boute et al.
patent: 4572192 (1986-02-01), Jackman et al.
patent: 4593695 (1986-06-01), Wittkampf
patent: 4624260 (1986-11-01), Baker, Jr. et al.
patent: 4686989 (1987-08-01), Smyth et al.
patent: 4712555 (1987-12-01), Thornander et al.
patent: 4712556 (1987-12-01), Baker, Jr.
patent: 4714079 (1987-12-01), Hedberg et al.
patent: 4781194 (1988-11-01), Elmqvist
patent: 4788980 (1988-12-01), Mann et al.
patent: 4802483 (1989-02-01), Lindgren
patent: 4905708 (1990-03-01), Davies
patent: 4920965 (1990-05-01), Funke et al.
patent: 4944298 (1990-07-01), Sholder
patent: 4969465 (1990-11-01), Pless et al.
patent: 5002052 (1991-03-01), Haluska
Chorus 6003-6033 Implantable Dual-Chamber Pulse Generator DDD MO Physician's Manual, published by ELA Medical, Inc., Minnetonka, MN (19 ).
den Dulk, K., M.D. et al., "Merits of Various Anti-PCMT Features," Abstracts, 5th International Congress, Cardiostim 86 (Monaco, Jun. 19-21, 1986), Clinical Progress in Electrophysiology and Pacing, (Jun. 1986, vol. 4, Supplement) (Futura Publishing Company, Mt. Kisco, NY).

Affiliated with

Also associated with

Rating

Implantable pacemaker including means and method of terminating does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Implantable pacemaker including means and method of terminating , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implantable pacemaker including means and method of terminating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1754194