Flow-occluding method for the diagnosis of heart conditions

Details Flow-occluding method for the diagnosis of heart conditions Flow-occluding method for the diagnosis of heart conditions

1986-05-30

1987-05-12

Metz, Andrew H.

Surgery

Truss

Pad

128668, 128695, 128710, C61B 502

Patent

active

046641254

ABSTRACT:
A method for analyzing the biomechanical behavior of the cardiac muscle and for diagnosing pathological conditions of the heart. The apparatus measures and records the rise and fall of intra-ventricular isovolumetric pressure monitored by a transducer installed at the tip of a cardiac catheter. The pressure versus time recordings during both the systolic and diastolic phases are mathematically analyzed, and two parameters indicative of the biomechanical conditions of the muscle are derived. The parameters are then plotted against each other on a map in which diagnostic zones of various normal and pathological heart conditions are delineated. The cardiac catheter is fitted with a balloon inflation valve used to close the aortic port during a single heartbeat in order to override the aortic valve and maintain the isovolumetric condition during contraction and relaxation of the cardiac muscle organ.

REFERENCES:
patent: 4223682 (1980-09-01), Sherman
patent: 4592364 (1986-06-01), Pinto
Randall et al., "Proceedings of the IEEE," vol. 63, No. 10, pp. 1399-1403 (Oct. 1975).

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