Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2007-06-19
2007-06-19
Pezzuto, Robert E. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C600S508000, C600S509000, C607S009000, C607S014000, C607S119000
Reexamination Certificate
active
11097706
ABSTRACT:
A method of evaluating ventricular performance of a heart employing sensors to measure a ventricular dimension signal and deriving indices of ventricular performance therefrom. Premature Shortening (PS) and Isovolumic Lengthening (IL) comprise two indices of ventricular performance determined from analysis of the left ventricular dimension signal during the transition from ventricular filling to ventricular ejection. Measured values of PS and IL are compared to other measured values or reference values to determine if ventricular performance has improved (or worsened). In some embodiments, the dimension sensors may comprise piezoelectric sonomicrometer crystals that operate as ultrasound transmitters and receivers. The sensors may be mounted in relation to a ventricle of the heart either temporarily or permanently, and may be configured either separately from or integrally with cardiac pacing leads.
REFERENCES:
patent: 6540699 (2003-04-01), Smith
patent: 6795732 (2004-09-01), Stadler et al.
patent: 2004/0015081 (2004-01-01), Kramer et al.
Euler David E.
Hettrick Douglas A.
Chapik Daniel G.
Medtronic Inc.
Patel Natasha
Pezzuto Robert E.
Wolde-Michael Girma
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