Surgery – Truss – Perineal
Patent
1977-02-09
1978-10-24
Kamm, William E.
Surgery
Truss
Perineal
A61B 504
Patent
active
041215761
ABSTRACT:
Vector cardiogram signals are processed by an analog computer circuit during a QRS wave interval in which a sheet of depolarization traverses a heart muscle to provide signals which enable a determination of the relative volume of heart muscle tissue that is functioning during the QRS wave interval. By comparing such relative volumes determined from signals processed from vectorcardiograms produced both before and after an "intervention" affecting the heart muscle, such as either a myocardial infarction or a therapeutic intervention following a myocardial infarction, it is possible to make a quantitative determination of the percentage of heart muscle tissue affected by the intervention.
A signal proportional to the volume of heart muscle tissue affected by a myocardial infarction is provided by processing vectorcardiogram signals obtained during a QRS wave interval prior to or at the onset of the infarction and vectorcardiogram signals obtained during a QRS wave interval following the infarction.
REFERENCES:
patent: 3548813 (1970-12-01), Berner
Lamb, "Vectorcardiography", 1965, only pp. 145, 162 and 163 available.
Mori et al., "Japanese Journal of Medical Electronics and Bio-Medical Engineering", vol. 13, No. 2, Apr. 1975, pp. 85-92.
Hellerstein et al., "American Journal of Cardiology", Dec. 1960, pp. 1049-1061.
Mori et al., "Japanese Circulation Journal", vol. 32, Feb. 1968, pp. 149-160.
Lamb, "American Journal of Cardiology", Jun. 1959, pp. 766-775.
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