Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-02-21
1996-06-18
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 1362
Patent
active
055273475
ABSTRACT:
There is provided a dual chamber pacemaker system and method for ventricular pacing to provide therapy for a patient with cardiomyopathy, this system being characterized by automatically adjusting the AV escape interval so that ventricular pace pulses are delivered at an AV delay which is optimized for HOCM and/or dialated cardiomyopathy therapy. The pacemaker system continually obtains and stores representations of a QRS wave characteristic such as duration, derived either directly from the QRS signal or from an FFRS signal, and compares duration data from one or more cycles to prior stored duration data. The system then adjusts the AV interval as a function of the duration comparison, and the direction of the last adjustment of AV escape interval. By this means, the AV escape interval is maintained at or just short of the onset of fusion, thereby automatically providing for optimally lengthened AV escape intervals consistent with full capture by the delivered ventricular pace pulse.
REFERENCES:
patent: 4428378 (1984-01-01), Anderson
patent: 5052388 (1991-10-01), Sivula et al.
patent: 5086774 (1992-02-01), Duncan
patent: 5144950 (1992-09-01), Stoop et al.
patent: 5334220 (1994-08-01), Sholder
patent: 5340361 (1994-08-01), Sholder
McDonald, Kenneth et al., "Permanent Pacing as Treatment for Hypertrophic Cardiomyopathy", The American Journal of Cardiology, vol. 68, Jul. 1991, pp. 108-110.
Jeanrenaud, Xavier et al., "Effects of Dual-Chamber Pacing in hypertrophic Obstructive Cardiomyopathy," The Lancet, vol. 339, May 1992, pp. 1318-1323.
McAreavey, Dorothea et al., "Altered Cardiac Hemodynamic and Electrical State in Normal Sinus Rhythm After Chronic Dual-Chamber Pacing for Relief of Left Ventricular Outflow Obstruction in Hypertrophic Cardiomyopathy", American Journal of Cardiology, vol. 7, Sep. 1992, pp. 651-656.
Seidelin, P. H., "Effects of Dual-Chamber Pacing in Hypertrophic Cardiomyopathy without Obstruction", The Lancet, vol. 340, Aug., 1992, pp. 369-370.
Boute, W., et al., "Morphology of Endocardial T-Waves of Fusion Beats", PACE, vol. 11, Nov. 1988, Part II, pp. 1693-1697.
Fananapazir, et al., "Impact of Dual Chamber Permanent Pacing in Patients with Obstructive Hypertrophic Cardiomyopathy with Symptoms Refractory to Verapamil and .beta.-Adrenergic Blocker Therapy", Circulation, vol. 8, No. 6, Jun. 1992, pp. 2149-2161.
Shelton Michael B.
Warkentin Dwight H.
Atlass Michael B.
Kamm William E.
Medtronic Inc.
Patton Harold R.
Schaetzle Kennedy J.
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