Abstract
This report describes a problem in cardiovascular roentgenology and a BASIC computer program that helped to solve it. The cardiovascular radiologist often needs to evaluate the anatomic form and physiologic function of the human left ventricle. The ventricle can be filled with a radiographically opaque contrast medium and cine angiograms made of the beating heart. Such films were made, projected and selected frames were measured. These measurements were in the input to a computer program which calculated the end diastolic volume, end systolic volume, stroke volume, ejection fraction and cardiac output. The machine calculations and print-out replaced hand calculations and reporting, which required approximately one hour. Compilation and execution of the program required approximately six seconds of central processor time of a medium size computer (Control Data 3300). The program solved a recurring problem in cardiac evaluation efficiently, swiftly and cheaply.
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