Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2006-05-02
2006-05-02
Pezzuto, Robert E. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C607S005000
Reexamination Certificate
active
07039457
ABSTRACT:
A method is provided for controlling an automatic external defibrillator without stopping CPR (primarily chest compressions). While chest compressions continue to be applied to the victim, the system differentiates between (1) a perfusing rhythm that has the capability of leading to a beating heart without a shock and (2) ventricular fibrillation (VF) which sometimes occurs in the presence of ventricular tachycardia (VT), in which there is no capability for leading to a beating heart without a shock. Defibrillation shocks should be applied only when needed and that is in the presence of VF and sometimes in the presence of VT. Electrocardiographic (ECG or EKG) signals obtained from electrodes applied to the patient's chest are analyzed so that the presence of a QRS signal characteristic of a rhythm which has the potential of supporting a beating heart, or the absence of a QRS signal which indicates ventricular fibrillation, may be detected in the presence of artifacts resulting from chest compressions.
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Bisera Joe
Weil Max Harry
Young Clayton
Institute of Critical Care Medicine
Mullen Kristen
Pezzuto Robert E.
Rosen Leon D.
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