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 -