Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2007-05-08
2007-05-08
Pezzuto, Robert E. (Department: 3766)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S009000, C607S018000, C607S025000
Reexamination Certificate
active
10499253
ABSTRACT:
In an implantable heart stimulating device, system and method, electrical stimulation pulses are delivered to first and second ventricles of a heart with a variable time interval therebetween, and signals are sensed at two different positions in the heart, from which an impedance value is derived. A minimum value and a maximum value of the impedance value are determined during a heart cycle, and a relationship between the minimum and maximum values also is determined. The time interval is varied and the relationship is monitored over a number of heart cycles. The time interval is set so that the relationship satisfies a predetermined requirement.
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Björling Anders
Kalling Sven
Ljungström Karin
Mandal Lars
Noren Kjell
Johnson Shevon
Pezzuto Robert E.
Schiff & Hardin LLP
St. Jude Medical AB
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