Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2011-01-25
2011-01-25
Layno, Carl H. (Department: 3766)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
Reexamination Certificate
active
07877144
ABSTRACT:
Methods for optimizing the atrio-ventricular (A-V) delay for efficacious delivery of cardiac resynchronization therapy. In CRT devices, the programmed A-V delay starts with detection of electrical activity in the right atrium (RA). Thus, a major component of the A-V delay is the time required for inter-atrial conduction time (IACT) from the RA to the LA. This IACT can be measured during implantation as the time from the atrial lead stimulation artifact to local electrograms in a coronary sinus (CS) catheter. Assuming that the beginning of LA contraction closely corresponds with the beginning of LA electrical activity, the optimal AV delay should be related to the time between the start of RA electrical activity and the start of LA electrical activity plus the duration of LA atrial contraction. Thus ‘during atrial pacing’ the IACT measured at implantation is correlated with the echocardiographically defined optimal paced AV delay (PAV).
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Coles, Jr. James A.
Levin Vadim
Razavi Mehdi
Ujhelyi Michael R.
Bauer Stephen W.
Duthler Reed A.
Heller Tammie K
Layno Carl H.
Medtronic Inc.
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