Measurement of left ventricular ejection fraction by videodensitometric analysis of digital subtraction angiograms

Jonathan Tobis, Orhan Nalcioglu, J Anthony Seibert, W. David Johnston, Walter L. Henry

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Left ventricular ejection fraction (LVEF) was calculated from 25 first-pass digital subtraction angiograms using a densitometric analysis. Digital subtraction angiograms are obtained in a computerized format; therefore, they can be readily analyzed with computer software to measure the density of the iodine signal within the image. The video signals from the image intensifier were logarithmically amplified so that there was a linear correlation between the video signal intensity and the depth of the iodine contrast material represented by that video signal. LVEF was also calculated by the area-length method from the same digital subtraction angiograms. There was close correlation between these two techniques (r = 0.94, standard error of the estimate = 5.04%). The videodensitometric EF technique is simple to perform, it correlates well with the standard area-length method, and is not dependent on geometric assumptions of LV geometry.

Original languageEnglish (US)
Pages (from-to)871-875
Number of pages5
JournalThe American journal of cardiology
Volume52
Issue number7
DOIs
StatePublished - Oct 1 1983

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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