Ventricular defibrillation threshold estimation

Details Ventricular defibrillation threshold estimation Ventricular defibrillation threshold estimation

2007-05-25

2011-10-04

Rayno, Carl H. (Department: 3766)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S008000, C607S028000

Reexamination Certificate

active

08032213

ABSTRACT:
Systems and methods are provided for estimating a patient's ventricular defibrillation threshold (VDFT). Stimulation pulses, which are of at least three different energy levels up to 2 Joules, are delivered to the patient's right ventricle during a window defined between an R-wave and a vulnerable period that follows the R-wave. Voltage potentials, induced in response to the delivered RV stimulation pulses, are measured at a location of the patient's left ventricle (LV) where it is predicted that potential gradients induced in response to RV stimulation pulses will be lowest. Potential gradients are computed using the measured voltage potentials. The patient's VDFT can then be estimated by estimating, based on the computed potential gradients, the RV stimulation energy level that would be required to achieve a minimum acceptable potential gradient at the location of the patient's LV where it is predicted that potential gradients induced in response to RV stimulation pulses will be lowest.

REFERENCES:
patent: 5851220 (1998-12-01), Murphy
patent: 6415179 (2002-07-01), Pendekanti et al.
patent: 6859664 (2005-02-01), Daum et al.
patent: 6889077 (2005-05-01), Bornzin et al.
patent: 6904314 (2005-06-01), Brewer et al.
patent: 2002/0133206 (2002-09-01), Daum et al.
patent: 2008/0249581 (2008-10-01), Wei
Zhou et al., “Epicardial mapping of ventricular defibrillation with monophasic and biphasic shocks in dogs,” Circ Res vol. 72, No. 1, Jan. 1993, pp. 145-160.
Idriss et al., “Predicting the potential gradient field in ventricular fibrillation from shocks delivered in paced rhythm,” Am J Physiol Heart Circ Physiol 268, 1995, pp. H2336-H2344.
Russo et al., “Defibrillation threshold testing: Is it really necessary at the time of implantable cardioverter-defibrillator insertion?” Heart Rhythm, vol. 2, No. 5, May 2005, pp. 456-461.
Chen et al., “the potential gradient field crated by epicardial defibrillation electrodes in dogs,” Circulation, vol. 34, No. 3, Sep. 1986, pp. 626-636.
Macanu et al., “A comparison of biventricular and conventional transvenous defibrillation: A computation study using patient derived models,” Pace, vol. 27, May 2004, pp. 586-593.
Pires et al., “intraoperative testing of the implantable cardioverter-defibrillator: How much is enough?,” J Cardiovasc Electrophysiol, vol. 17, No. 2, Feb. 2006, pp. 140-145.
Sun et al., “DFT test via pacing measurements without VF induction and shocking,” Abstract, Pace, vol. 23, p. 611.

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