Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-08-05
1999-07-27
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 139
Patent
active
059282690
ABSTRACT:
Apparatus is disclosed for temporary treatment of atrial fibrillation of a patient's heart for limited periods of time. An external control unit generates electrical shock impulses; and is electrically connected to spaced-apart defibrillation electrodes of a flexible catheter adapted for temporary implantation in the body of a patient. One of the defibrillation electrodes is positioned in the right atrium of the patient's heart and the other defibrillation electrode is positioned elsewhere proximate the heart to establish a vector through the atrial chambers. A shock impulse is selectively applied from the control unit across the electrodes with a magnitude to establish an adequate field gradient between them so as to cardiovert atrial fibrillation to sinus rhythm. Monitoring of intracardiac and/or surface ECG activity enables detection of the QRS complex to trigger the selective application for delivery of a shock impulse in synchronization with the QRS complex.
REFERENCES:
patent: 5403353 (1995-04-01), Alferness et al.
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