University of Texas System

Chia-Ling Wei

Marc D Feldman

Jonathan Walker Valvano

John Anthony Pearce

An apparatus for determining cardiac performance in the patient includes a plurality of electrodes adapted to be placed in the patient and in communication with a heart chamber of the patient for measuring conductance and blood volume in the heart chamber of the patient; and a processor for determining instantaneous volume of the ventricle based on measurement of complex admittance at a plurality of frequencies to identify mechanical strength of the chamber, the processor in communication with the electrodes. A method for determining cardiac performance in a patient.

Method and apparatus for determining cardiac performance in a patient with a conductance catheter

An apparatus for determining cardiac performance in the patient. The apparatus includes a conductance catheter for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor is in communication with the conductance catheter. Methods for determining cardiac performance in a patient. Apparatuses for determining cardiac performance in a patient.

An apparatus for determining cardiac performance in the patient involving a conductance catheter () for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor () for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor () is in communication with the conductance catheter ().

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Tainan, Taiwan

Chia-Ling Wei