Left ventricular videometry.

Abstract To quantitatively describe left-ventricular dynamics, a computer is used to process video angiocardiographic recordings. A special interface for transferring the video information to the computer and a border definition algorithm are used to automatically obtain the border coordinates of the ventricular chamber for each video field ( 1 60 sec ) during systole. For each point in the digitized picture matrix, the probability that the point should be designated as the border is computed. This probability is the product of four separate border definition criteria. The computer determined borders are in good visual agreement when superimposed upon the original video images.