Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2005-11-29
2005-11-29
Getzow, Scott M. (Department: 3762)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S009000
Reexamination Certificate
active
06970743
ABSTRACT:
An implantable cardiac stimulation device provides long QT interval therapy for preventing abnormal ventricular activation-recovery time and ultimately ventricular arrhythmias. The device includes a sensing circuit that senses intracardiac activity of a heart and that generates electrical signals representing electrical activity of the heart. The device includes a physiologic sensor, such as body motion, or other diurnally varying sensor that reliably detects a diurnal state of the patient (i.e., not the QT interval itself). The device further includes a measuring circuit that measures a QT interval of the electrical signals, a control circuit that determines whether the QT interval is appropriate for the diurnal state, and a pulse generator that delivers pacing pulses to at least one chamber of the heart at a pacing rate when the QT Interval is pathologically too long. Furthermore, the pacing rate control circuit varies the pacing rate of the pulse generator responsive to the measured QT interval according to the measured diurnal state.
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Levine Paul A.
Weinberg Lisa P.
Getzow Scott M.
Pacesetter Inc.
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