Surgery – Truss – Perineal
Patent
1975-09-29
1976-10-05
Kamm, William E.
Surgery
Truss
Perineal
128206B, A61B 504
Patent
active
039838676
ABSTRACT:
A 360.degree. hexaxial reference system orthogonal display of voltage versus time generated in response to heart activity is directly provided with the display having 30.degree. angular separation between adjacent electrode pair potential difference electrocardiographic sampled voltages. Both Einthoven bipolar leads and augmented V unipolar leads, each of which comprise an electrode pair, are disposed at predetermined locations with respect to the arms and legs of the body of a patient whose heart activity is to be diagnosed. Sequential selection of the electrode pairs one-by-one, from the plurality of bipolar and unipolar electrode pairs together with selective polarity reversal of the potential differences associated with the various leads for the electrode pairs is accomplished to provide the 30.degree. angular separation between adjacent electrode pair potential differences for directly providing the 360.degree. hexaxial reference system orthogonal display. The display which respectively comprises lead I, lead AVR with the polarity reversed, lead II, lead AVF, lead III, lead AVL with the polarity reversed, lead I with the polarity reversed, lead AVR, lead II with the polarity reversed, lead AVF with the polarity reversed, lead III with the polarity reversed, and lead AVL will respectively provide vectors at 0.degree., 30.degree., 60.degree., 90.degree., 120.degree., 150.degree. , 180.degree., -150.degree., -120.degree., -90.degree., -60.degree., and --30.degree., whereby cardiogram analysis including determination of the mean vector is enhanced.
REFERENCES:
patent: 2098695 (1937-11-01), Southwick
patent: 2714380 (1955-08-01), Freshman
patent: 3058458 (1962-10-01), Daneman
patent: 3256733 (1966-06-01), Carlin
patent: 3585988 (1971-06-01), Creigh et al.
patent: 3707147 (1972-12-01), Sellers
patent: 3868948 (1975-03-01), Graetz
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