Method and apparatus for improved prediction of transvenous defi

Details Method and apparatus for improved prediction of transvenous defi Method and apparatus for improved prediction of transvenous defi

1995-04-03

1996-10-15

Kamm, William E.

Surgery

Truss

Pad

607 8, A61N 139

Patent

active

055644228

ABSTRACT:
A system and method for predicting the defibrillation threshold energy of a defibrillation lead arrangement by determining the upper limit of vulnerability of the heart by shocking the heart at varying times during the T-wave at decreasing test shock energy levels until fibrillation is induced in the heart. The lowest energy level which fails to induce fibrillation is determined to be the upper limit of vulnerability and the defibrillation threshold is predicted to be an energy level incrementally higher in the range of about 5 Joules.

REFERENCES:
patent: 5105809 (1992-04-01), Bach, Jr. et al.
patent: 5346506 (1994-09-01), Mower et al.
"Relation Between Upper Limit of Vulnerability and Defibrillation Threshold in Humans", Chen et.al., Circulation vol. 88, No. 1, 186-92(Jul. 1993).

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