An accurate and simplified method to calculate angiographic left ventricular ejection fraction

Francisco A. Tortoledo, Genaro C. Fernandez, Miguel A. Quinones

Research output: Contribution to journalArticle

Abstract

An accurate and simplified method to calculate left ventricular (LV) ejection fraction (EF) derived from the ellipsoidal formula for LV volume calculation is described. The LV minor axis (D) is obtained from the average of three equidistant LV diameters at end-diastole (Ded) and end-systole (Des), and the shortening fraction of D2 (%ΔD2) calculated as (D2ed - D2es)/D2ed. EF is calculated as EF = [ΔD2 + ([1 - ΔD2] x ΔL)] x 100, where ΔL = shortening fraction of the long axis. The coefficient of correlation between the EF by this method and the EF derived from measurements of LV volumes with the area-length method was 0.98, SEE = 3.57% (n = 50). No significant over- or underestimation was observed according to the regression equation Y = 0.922x + 0.82. Thus, this simplified method allows accurate LVEF calculation without the need for planimetry of LV area.

Original languageEnglish (US)
Pages (from-to)357-362
Number of pages6
JournalCatheterization and Cardiovascular Diagnosis
Volume9
Issue number4
DOIs
StatePublished - 1983

Keywords

  • ejection fraction
  • left ventricular function

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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