| US 7,522,956 B2 | ||
| Apparatus and method for treating ventricular tachyarrhythmias | ||
| David B. Krig, Brooklyn Park, Minn. (US); James O. Gilkerson, Stillwater, Minn. (US); Robert D. Dreher, Roseville, Minn. (US); Jan D. Wald, Edina, Minn. (US); William J. Linder, Golden Valley, Minn. (US); and William L. Zimmer, Roseville, Minn. (US) | ||
| Assigned to Cardiac Pacemakers, Inc., St. Paul, Minn. (US) | ||
| Filed on Mar. 07, 2005, as Appl. No. 11/73,818. | ||
| Application 11/073818 is a continuation of application No. 10/008367, filed on Nov. 13, 2001, granted, now 7,113,824. | ||
| Application 10/008367 is a continuation of application No. 09/686585, filed on Oct. 11, 2000, granted, now 6,317,632. | ||
| Application 09/686585 is a continuation of application No. 09/376245, filed on Aug. 18, 1999, granted, now 6,151,524. | ||
| Application 09/376245 is a continuation of application No. 08/947256, filed on Oct. 08, 1997, granted, now 5,978,707. | ||
| Claims priority of provisional application 60/045212, filed on Apr. 30, 1997. | ||
| Prior Publication US 2005/0149135 A1, Jul. 07, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. A61N 1/39 (2006.01) | ||
| U.S. Cl. 607—4 | 18 Claims |
| 1. An implantable cardioverter-defibrillator, comprising:
an atrial catheter including at least one atrial sensing electrode;
a ventricular catheter including at least one ventricular sensing electrode and at least one ventricular defibrillation electrode;
sensing circuitry, coupled to the atrial catheter and the ventricular catheter, the sensing circuitry adapted to sense atrial
events and ventricular events from the electrodes;
therapy delivery circuitry, coupled to the ventricular catheter, the therapy delivery circuitry adapted to apply or inhibit
a ventricular tachycardia therapy; and
control circuitry, coupled to the sensing circuitry and therapy circuitry, the control circuitry adapted to:
detect at least one of a ventricular tachycardia and a ventricular fibrillation by analyzing the sensed ventricular events;
start a first time interval when the at least one of the ventricular tachycardia and the ventricular fibrillation is detected;
analyze the sensed atrial and ventricular events during the first time interval for assessing an origin of the detected at
least one of the ventricular tachycardia and the ventricular fibrillation;
determine whether to delay or inhibit the ventricular tachycardia therapy based on the origin of the detected at least one
of the ventricular tachycardia and the ventricular fibrillation;
determine whether the detected at least one of the ventricular tachycardia and the ventricular fibrillation is sustained during
the first time interval; and
reset the first time interval if the at least one of the ventricular tachycardia and the ventricular fibrillation does not
sustain during the first time interval.
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