Microcomputer program for the determination of haemodynamic indices using measurements obtained with a balloon-tipped pulmonary artery catheter.

A microcomputer program is described which facilitates the calculation of data from physiological variables measured using a flow directed, balloon-tipped thermal dilution pulmonary artery catheter. Eleven variables may be calculated and left ventricular function may be displayed graphically using as coordinates left ventricular stroke work index and pulmonary artery wedge pressure. Successive measurements may be easily compared and the program has proved valuable in the management of patients monitored with a right heart catheter.