Apparatus and method for measuring heart condition

Details Apparatus and method for measuring heart condition Apparatus and method for measuring heart condition

1975-04-03

1976-06-22

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

128 205R, G06G 760, A61B 502

Patent

active

039653390

ABSTRACT:
Apparatus and method for continuous measurement and display of the endocardial viability ratio of a patient to provide an indication of the condition of the heart muscle. A system using signals representative of the systemic arterial pressure and the left atrial pressure as inputs to generate a tension time index and a diastolic pressure time index by separation of the systemic arterial pressure wave form into two parts and selective integration of the inputs, followed by division to obtain the desired ratio.

REFERENCES:
patent: 3087488 (1963-04-01), Streimer
patent: 3304413 (1967-02-01), Lehmann et al.
patent: 3556082 (1971-01-01), McCullough
patent: 3563661 (1971-02-01), Charlson et al.
patent: 3566092 (1971-02-01), Grant et al.
patent: 3651318 (1972-03-01), Czekajewski
patent: 3720818 (1973-03-01), Spragg et al.
patent: 3831590 (1974-08-01), Boyle et al.
G. D. Buckberg et al., "Experimental Subendocardial Ischemia in Dogs with Normal Coronary Arteries," Circulation Research, vol. XXX, Jan. 1972, pp. 67-81.

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