Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1996-05-07
1998-05-12
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
057499012
ABSTRACT:
A method for defibrillating a patient's heart with an implantable defibrillator having defibrillation synchronized to the fibrillation waveform is disclosed. The defibrillator is used to detect fibrillation in a patient's heart, monitor at least two far-field fibrillation voltages across at least three spaced-apart electrodes while the high voltage capacitors are charging, then deliver a high energy shock during a period of ventricular fibrillation when the absolute values of the peak and trough voltages exceed a threshold based on a desired percentage greater than a running average of the absolute values of the peaks and troughs of the fibrillation voltages monitored during and after capacitor charging. The shock is then delivered synchronous with the next significant cardiac complex. The defibrillator also includes a safety timer so that if the threshold is not reached within a specified safe time limit, the high energy shock will be delivered without further delay.
REFERENCES:
patent: 3612041 (1971-10-01), Ragsdale
patent: 3614954 (1971-10-01), Mirowski et al.
patent: 3698386 (1972-10-01), Fried
patent: 4114628 (1978-09-01), Rizk
patent: 4365639 (1982-12-01), Goldreyer
patent: 4523595 (1985-06-01), Zibell
patent: 4825871 (1989-05-01), Cansell
patent: 5107834 (1992-04-01), Ideker et al.
patent: 5107850 (1992-04-01), Olive
patent: 5184615 (1993-02-01), Nappholz et al.
patent: 5188105 (1993-02-01), Keimel
patent: 5190034 (1993-03-01), Sholder
patent: 5193550 (1993-03-01), Duffin
patent: 5205283 (1993-04-01), Olson
patent: 5265602 (1993-11-01), Anderson et al.
patent: 5331966 (1994-07-01), Bennett et al.
"Genesis of Sigmoidal Dose-Response Curve During Defibrillation by Random shock: A Theoretical Model Based on Experimental Evidence for a Vulnerable Window During Ventricular Fibrillation", Hsai, et al., Pace, vol. 13, Oct. 1990, pp. 1326-1342.
"On-Line Electronic Identification of a Period of Vulnerability to Defibrillation using Real-time Ventricular Fibrillation Waveform analysis", Hsai, et al., p. 0267.
"Fourier Analysis of Ventricular Fibrillation and Synchronization of DC Countershocks in Defibrillation", Carlisle, et al., Journal of Electrocardiology, 21 (4) 1988, pp. 337-343.
"Ventricular Fibrillation: The Importance of Being Coarse?", Jones, et al., J. Electrocardiology, 17 (4) 1984, pp. 393-400.
"Synchronization of Low-Energy Pulses to Rapid Deflection Signals as a Possible Mechanism of Subthreshold Ventricular Defibrillation", Mower, et al., Am. Heart Assoc. Abstracts of 55th Scientific Sessions, No. 298.
"Wavefront Orientation Effects on Bipolar Epicardial Electrograms", Blanchard, et al., Computers in Cardiology, Sep. 23-26, 1990 (IEEE 1991), pp. 111-114.
Chapter entitled "Vectorcardiography", Geddes, Cardiovascular devices and their Applications, 1984, pp. 237-250.
Chapter entitled "Vectorcardiography", Geddes, Principles of Applied Biomedical Instrumentation, 1968, p. 464-477.
Page 464 from Physiology, The C.V. Mosby Company, 1983.
Bush M. Elizabeth
Fain Eric S.
Bush M. Elizabeth
Kamm William E.
Mitchell Steven M.
Pacesetter Inc.
LandOfFree
Method and apparatus for delivering defibrillation shocks with i does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for delivering defibrillation shocks with i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for delivering defibrillation shocks with i will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-975684