TY - JOUR
T1 - An accurate and simplified method to calculate angiographic left ventricular ejection fraction
AU - Tortoledo, Francisco A.
AU - Fernandez, Genaro C.
AU - Quinones, Miguel A.
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1983
Y1 - 1983
N2 - 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.
AB - 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.
KW - ejection fraction
KW - left ventricular function
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U2 - 10.1002/ccd.1810090406
DO - 10.1002/ccd.1810090406
M3 - Article
C2 - 6627386
AN - SCOPUS:0021027303
VL - 9
SP - 357
EP - 362
JO - Catheterization and Cardiovascular Diagnosis
JF - Catheterization and Cardiovascular Diagnosis
SN - 0098-6569
IS - 4
ER -