Apparatus and method for temporary atrial defibrillation with external defibrillator and implanted transvenous catheter and electrodes
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United States of America Patent
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Jul 27, 1999
Issued Date -
N/A
app pub date -
Aug 5, 1997
filing date -
Apr 4, 1994
priority date (Note) -
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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.
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