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

摘要

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.

主权项

1. A method for determining cardiac performance in a patient from a plurality of desired wave forms received from electrodes placed in the patient and in communication with a heart chamber of the patient comprising the steps of :
receiving and separating with a data acquisition mechanism the plurality of desired wave forms at desired frequencies from the electrodes; and determining with a computer instantaneous volume of the heart chamber by applying a non-linear relationship between measured conductance and volume of blood in the heart chamber to identify mechanical strength of the chamber from the desired wave forms at desired frequencies, the processor in communication with the data acquisition mechanism.