Determination of left ventricular volumes with use of DSA density values

A computer program was developed to obtain left ventricular volumes from the density values of DSA. The highest density value along the horizontal pixel line over the left ventricle in 30 degrees RAO was considered to correspond to the greatest width on the same level of 60 degrees LAO. The left ventricular volume was obtained by converting the density values into the width and integrating these values. This method estimated experimental balloon volumes with considerable accuracy. Clinical evaluation revealed good correlation between DSA and conventional cine left ventriculography.