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Digital filtering of left ventricular heart volume and calculation of aortic valve blood flow

✍ Scribed by Richard C. Brooks; V.David VandeLinde; K.E. Hammermeister; J.Richard Warbasse

Publisher: Elsevier Science
Year: 1971
Tongue: English
Weight: 654 KB
Volume: 4
Category: Article
ISSN: 0010-4809
DOI: 10.1016/0010-4809(71)90019-x

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✦ Synopsis

The volume of the left ventricle of the heart can be calculated from measurements taken from tine angiocardiograms. During normal systole, blood leaves the left ventricle via the aortic vaIve; therefore, the first derivative of left ventricular volume with respect to time (during systole) is equal to aortic valve blood flow. Since a curve of left ventricular volume versus time contains significant scatter, it must be filtered, or smoothed, prior to differentiation.

This paper describes three methods of digitally filtering left ventricular volume, and discusses methods of calculating aortic valve blood flow. All three methods of smoothing volume give similar results.

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