Closed loop impedance-based cardiac resynchronization...

Details Closed loop impedance-based cardiac resynchronization... Closed loop impedance-based cardiac resynchronization...

2005-11-02

2008-10-21

Layno, Carl H. (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

Reexamination Certificate

active

07440803

ABSTRACT:
This document discusses, among other things, systems, devices, and methods measure an impedance and, in response, adjust an atrioventricular (AV) delay or other cardiac resynchronization therapy (CRT) parameter that synchronizes left and right ventricular contractions. A first example uses parameterizes a first ventricular volume against a second ventricular volume during a cardiac cycle, using a loop area to create a synchronization fraction (SF). The CRT parameter is adjusted in closed-loop fashion to increase the SF. A second example measures a septal-freewall phase difference (PD), and adjusts a CRT parameter to decrease the PD. A third example measures a peak-to-peak volume or maximum rate of change in ventricular volume, and adjusts a CRT parameter to increase the peak-to-peak volume or maximum rate of change in the ventricular volume.

REFERENCES:
patent: 5626623 (1997-05-01), Kieval et al.
patent: 5788643 (1998-08-01), Feldman
patent: 6070100 (2000-05-01), Bakels et al.
patent: 6076015 (2000-06-01), Hartley et al.
patent: 6219579 (2001-04-01), Bakels et al.
patent: 6223082 (2001-04-01), Bakels et al.
patent: 6238420 (2001-05-01), Bakels et al.
patent: 6278894 (2001-08-01), Salo et al.
patent: 6280389 (2001-08-01), Ding et al.
patent: 6751503 (2004-06-01), Kroll
patent: 6751504 (2004-06-01), Fishler
patent: 6754530 (2004-06-01), Bakels et al.
patent: 6885889 (2005-04-01), Chinchoy
patent: 7127289 (2006-10-01), Yu et al.
patent: 7283873 (2007-10-01), Park et al.
patent: 2002/0002389 (2002-01-01), Bradley et al.
patent: 2003/0100925 (2003-05-01), Pape et al.
patent: 2003/0204212 (2003-10-01), Burnes et al.
patent: 2003/0216657 (2003-11-01), Holmstrom et al.
patent: 2004/0015081 (2004-01-01), Kramer et al.
patent: 2004/0015196 (2004-01-01), Holstrom et al.
patent: 2004/0049238 (2004-03-01), Jarverud
patent: 2004/0078058 (2004-04-01), Holmstrom et al.
patent: 2005/0043895 (2005-02-01), Schechter
patent: 2005/0049646 (2005-03-01), Czygan et al.
patent: 2005/0182447 (2005-08-01), Schecter
patent: 2006/0271121 (2006-11-01), Ding et al.
patent: 2007/0043394 (2007-02-01), Zhang et al.
patent: 2007/0129781 (2007-06-01), Yu et al.
Abe et al. Asynchronous Relaxation of the Ischemic Left Ventricle. Japanese Circulation Journal. Jan. 1982; 46(1) 103-112.
Yinghong, Yu et al., “A Cardiac Resynchronization System Employing Mechanical Measurement of Cardiac Walls”, U.S. Appl. No. 11/549,676, filed Oct. 16, 2006, 28 pages.
Yu, Yinghong, et al., “Biventricular mechnical asynchrony predicts hemodynamic effects of uni- and biventricular pacing”,Am J Physiol Heart Circ Physiol, vol. 285, (2003), H2788-H2796.
Yu, C.-M., et al., “High Prevalence of Left Ventricular Systolic and Diastolic Asynchrony in Patients With Congestive Heart Failure and Normal QRS Duration”,Heart, vol. 89, (2003), 54-60.
Zhang, Yunlong, “Intracardiac Impendance and its applications”, U.S. Appl. No. 11/208,922, filed Aug. 22, 2005, 36 Pgs.
“Non-Final Office Action mailed Apr. 26, 2007 in U.S. Appl. No. 11/136,894 ”, 11 pages.

Affiliated with

Also associated with

Rating

Closed loop impedance-based cardiac resynchronization... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Closed loop impedance-based cardiac resynchronization..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed loop impedance-based cardiac resynchronization... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3998696